Na seznamu bo več tipov teleskopov.
Kratek opis teleskopov
Najbolj preprosta shema teleskopa - levo je zbiralna leča kot objektiv, desno je zbiralna leča kot okular. Objektiv tvori realno in obrnjeno sliko, okular pa deluje kot lupa, ki to sliko še dodatno poveča (tam kjer se stikajo črtkane premice). V resnici sta objektiv in okular sestavljeni iz večih leč iz različnih stekel, da se odpravi barvno napako. Glej poglavje o optiki.
S teleskopom povečamo zorni kot, pod katerim gledamo dani oddaljeni objekt - slika zgoraj.
Teleskop je v grobem sestavljen iz objektiva (ki tvori sliko) in okularja (ki je v bistvu lupa, ki poveča sliko, katero tvori objektiv). Večji je premer objektiva - svetlejša in bolj razločna bo slika. Okular pa je večinoma sestavljena zbiralna leča (še enkrat ponovimo - okular je lupa, ki poveča sliko, katero tvori objektiv). Kotna povečava (M) je definirana kot razmerje med goriščno razdaljo (f_ob) objektiva in goriščno razdaljo (f_ok) okularja: M = f_ob/f_ok.
Primer: če pri teleskopu z goriščno razdaljo 1000 mm uporabimo okular 25 mm, dobimo povečavo 1000 mm/25 mm = 40x, pri okularju 5 mm pa povečavo 1000 mm/5 mm = 200x. Povečava 40x je primerna za razsute kopice, večje meglice, ..., povečava 200x pa je odlična za planete, tesne dvojne zvezde ... Maksimalna (M_max) in minimalna (M_min) smiselna povečava je odvisna od premera (D) objektiva:
M_max = 2xD_v_mm
M_min = D/7mm
Številka 7 mm predstavlja premer maksimalno odprte zenice mlade osebe v temi. Primer - teleskop z objektivom premera 200 mm omogoča maksimalne povečave nekje do M_max = 2xD_v_mm = 2X200 = 400X. Večje povečave so jalove, saj nam ne razkrivajo nobenih novih podrobnosti (slika zaradi ukolona svetlobe na objektivu postane neostra) - povečav 400x ali več tudi atmosfera večinoma ne omogoča (migetanje slike). Minimalna še smiselna povečava, da nam svetloba ne pade izven očesne zenice pa je pri omenjenem teleskopu M_min = D/7mm = 200mm/7mm = 29X ali 30X (odvisno tudi od starosti, z leti maksimalna zenica pade iz 7 mm premera na 6 ali manj mm - velja za nočno gledanje). Manjše povečave nam ponudijo večje zorne kote, svetlejšo sliko in so primerne za razsežnejše objekte (razsute kopice, meglice, galaksijo M31, itn). Za vajo izračunajte minimalno in maksimalno povečavo za teleskopa premerov objektivov 100 mm in 400 mm.
Kot smo že omenili, zgornje povečave omejujejo tudi razmere v atmosferi (mirnost ozračja) in so večinoma smiselne do 200X, ob izjemnih pogojih pa do 600x. Pri teleskopu ponavadi podajo dva podatka, premer objektiva in zaslonko - to je razmerje med goriščno razdaljo objektiva (f) in premerom objektiva teleskopa (D). Primer - teleskop s premerom objektiva D = 200 mm in goriščno razdaljo objektiva f = 1200 mm (torej ima zaslonko 1200 mm/200 mm = 6), bi imel zapisano na specifikaciji naslednja dva podatka:
200 mm, f/6.
Pri teleskopih gredo zaslonke od približno 4 pa tja do okrog 13. T. i. "hitri" teleskopi so tisti, ki imajo majhne vrednosti zaslonk (6 ali manj: f/6, f/5, f/4.6, f/4, ...), torej velike premere objektivov in tozadevno zelo svetle slike. Počasnejši teleskopi pa imajo zaslonke 7 ali več. Bolj natančna razdelitev teleskopov pravi, da so hitri tisti z razmerjem manj kot f/5, od f/6 do f/10 so srednje hitri, počasni teleskopi pa imajo goriščno razmerje več kot f/10.
Zelo pomembna je tudi ločljivost teleskopa (kot pod katerim še ločimo podrobnosti opazovanih objektov) in je funkcija premera (D) ter valovne dolžine :
mejni kot je φo= 0,61*λ/R=1,22*λ /D≈λ/D).
Ločljivost očesa je okrog ene ločne minute (1', kar ustreza valovni dolžini okrog 555 nm in zenici 2mm).
Poenostavljena formula za ločljivost v ločnih sekundah je, velja za valovno dolžino 555 nm:
ločljivost[''] = 140/D_v_mm['']
- preverite ali drži (primer, 70 mm-ski daljnogled ima torej ločljivost 140/70 = 2 ločni sekundi).
Ločljivost je zelo pomembna - opazovan predmet nam pri večji ločljivosti teleskopa pokaže veliko več podrobnosti. Zorni koti planetov so od nekaj ločnih sekund ('') pa do nekaj 10 ločnih sekund. Njihov zorni kot je torej pod ločljivostjo človeškega očesa (kot da bi z navadnim metrom merili velikosti atomov). Sedaj torej razumemo, zakaj recimo pri Saturnu s prostim očesom ne moremo opaziti obročkov - ločljivost očesa je namreč samo okrog ene ločne minute (60''). S teleskopom premera objektiva 200 m, ki ima ločljivost φo = 140''/200 = 0.7'' (ločne sekunde) pa se Saturnovi obročki že zelo lepo opazijo pri povečavah 40X, še bolje pri višjih povečavah, recimo 120X ali 200X. Zorni kot Saturnovih obročkov je med opozicijo (ko je Saturn najbližje Zemlji) dobrih 40''.
Zelo pomebna je tudi montaža, stojalo teleskopa. Ekvatorialne montaže (os stojala je vzporedna z osjo rotacije Zemlje) so (brez posebnih dodatkov) zelo primerni za fotografiranje. Alt-azimutne viličaste montaže pa so lažje, enostavnejše, a se pri fotografiranju pozna rotacija polja. Za začetnike zelo priporočamo teleskope brez motorčkov in računalnika. Pozneje pa se oprema lahko nadgradi v "go-to" teleskope (stojala).
V splošnem se delijo teleskopi na refraktorje (objektiv je sestavljena leča), reflektorje (objektiv je vbočeno zrcalo - v glavnem parabolične oblike) in kombinirane (katadioptrični teleskopi - objektiv je kombinacija reflektorja in refraktorja).
Osnovna tipa katadioptričnih kombiniranih teleskopov sta Schmidt-Cassegrain (Schmidtova korekcijska leča za odpravo sferične aberacije) in Maksutov-Cassegrain (močno ukrivljena korekcijska leča s sferičnima površinama, sekundarno zrcalo je kar aluminiziran del korekcijske leče). Prednosti so, da ni izrazite barvne napake in kome, imajo zelo kratke optične cevi (so zato enostavno prenosljivi), so cenejši kot apokromatični teleskopi (refraktorji iz več kot dveh leč). Slabost so, da so nekoliko dražji od močno razširjenega Newtonovega tipa teleskopa, in da zaradi številnejših optičnih komponent pride do večje izgube svetlobe in kdaj trpi tudi ostrina slike.
Pri reflektorjih omenimo samo nekaj tipov, to so Newton, Cassegrain, Nasmythova izvedba Cassegrainovega tipa, Ritchey-Chretien ... Prednosti so večinoma nizka cena (Newton), ni barvne napake, območje delovanje zajema večji razpon valovnih dolžin, večinoma enostavna izdelava. Cassegrain, Nasmythova izvedba Cassegrainovega tipa, Ritchey-Chretien imajo zelo kratke cevi - to zelo poenostavi prenos in tudi opazovanja. Slabosti reflektorjev so v optičnih napakah proti robu vidnega polja (koma, ukrivljenost polja).
Refraktor je teleskop, ki za objektiv uporablja dve do štiri leče. Ločimo akromatični in apokromatični tip. Akromatični objektiv je sestavljen iz izbočene leče iz kronskega stekla (nizek lomni količnik) in vbočene leče iz flintskega stekla (visok lomni količnik). Goriščna razdalja je odvisna od obeh leč. Slabost akromatičnega objektiva je barvna napaka (goriščna razdalja ni enaka za vse valovne dolžine). Objektiv brez vidne barvne napake se imenuje apokromatični. Osnovni fokus je dosežen v treh točkah s pomočjo uporabe posebnih stekel ali tekočin s posebnimi optičnimi lastnostni. Prednosti refraktorjev so ostra in kakovostna slika (pri apokromatih). Slabosti refraktorjev so izjemno visoka cena apokromatskih objektivov, barvna napaka cenenih akromatskih objektivov, premer objektiva je navzgor omejen na približno 1 meter (većji premeri se zaradi prevelike mase ukrivijo in so praktično neuporabni).
Sledi nekaj slik, iz katerih razberemo geometrijo teleskopov,
- kako deluje zrcalni teleskop (recimo tip Newton),
- kako lahko skrajšamo optično cev (tip Schmidt-Cassegrain), itn
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| Še nekaj skic in tipov teleskopov. |
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OGLEJ SI slike različnih tipov in montaž teleskopov. |
 Pot žarkov in optika teleskopa Schmidt-Newton. |
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Klevtsov-Cassegrain, optika teleskopa
(pred sekundarjem ima korekcijske leče, res zanimivo).
Fizična izvedba teleskopa Klevtsov-Cassegrain, kraki pajka so zviti v lok - manjši učinek ukolona svetlobe. |
T. i. "CAT-Newton" |
 Odprava barvne napake refraktorja. Vir: http://www.letusdirect.com/images/stories/library/achromat/achromat.jpg |
Namizni teleskopi od 80 mm do 100 mm premera
Še o pretvorbi enot (za maso in dolžino), ki se v tekstu pogosto pojavljata:
1.0 lbs = 0.453592 kg = 0.454 kg
1" = 2.54 cm
Še uvodno opozorilo!
Nikakor pa ne priporočam nakupa plastičnih teleskopov za okrog "20 eur" z zanič optiko in na majavih stojalih. Vsi spodaj našteti teleskopi so v rangu solidnih prenosnih naprav, slike katerih so že dokaj verodostojna podoba nebesnih objektov (kot smo že omenili v uvodnem odstavku - od Lune, planetov do svetlejših megličastih objektov, svetlejših galaksij in zvezdnih kopic, dvojnih zvezd - za opazovanje Sonca morate obvezno dokupiti ustrezen filter, ki se ga varno namesti čez vhodno odprtino objektiva - opazovanje Sonca brez filtra povzroči trajno slepoto!!!).
Sledi nekaj primerov namiznih teleskopov z ročnim vodenjem (pogojno gredo tudi v nahrbtnik):
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Priporočam
http://www.teleskop-express.de/shop/product_info.php/info/p7487_Orion-GoScope-80mm-TableTop-Refractor-Telescope.html
Splača se dokupiti x3 Barlow:
http://www.teleskop-express.de/shop/product_info.php/info/p56_TSOptics-TSB31-3x-ED-Barlow-Lens---1-25-inch---3x-more-magnification.html
Orion GoScope 80mm TableTop Refractor Telescope
143,00 EUR
Orion GoScope 80mm TableTop Refractor Telescope
Bring the cosmos to your table! This little wonder telescope packs a big performance punch with its 80mm aperture refractor optics and compact portable tabletop base. Observe the Moon, planets, star clusters and bright cloudy nebulas. EZ Finder II red-dot sight makes it easy to accurately aim the GoScope, then you can view them through the included 20mm or 10mm 1.25" telescope eyepieces. Lightweight design lets you take the GoScope anywhere and its base can be easily mounted on a tripod with a 3/8" or 1/4"-20 threaded post. Ideal for beginners, the GoScope 80mm collects over 70% more light than a 60mm refractor telescope.
More Info:
For a portable telescope that excels at wide-field stargazing, look no further than the Orion GoScope 80mm TableTop Refractor Telescope. This ultra-compact, entry-level refractor with a tabletop mount makes a great, high-quality first telescope for beginning stargazers. But it's not just for newbies - the GoScope 80mm TableTop Refractor's convenient small size makes it a true "grab-and-go" telescope, perfect for the mobile interests of more experienced hobbyists. The entire telescope weighs just 5.65 lbs. assembled (including eyepiece and reflex sight) so it's easy for anyone on the family to take it out to the backyard table or favorite observing site.
With an 80mm objective lens and 350mm focal length (f/4.3), the GoScope 80 refractor performs rather impressively for its modest size, collecting over 30% more light than its 70mm counterpart, and over 70% more light than a 60mm refractor. Not only will views appear brighter in the GoScope 80 TableTop Refractor Telescope, but you'll be able to see more objects in the night sky with this telescope compared to smaller diameter models.
Specifications:
Optical design: Refractor
Optical diameter: 80mm
Focal length: 350mm
Focal ratio: f/4.3
Coatings: Coated
Optics type: Air-spaced doublet
Glass material: Crown/Flint
Eyepieces: 3-Element 20.0mm,10.0mm (1.25")
Magnification with included eyepieces: 17x, 35x
Resolving power: 1.45arc*sec
Lowest useful magnification: 12x
Highest useful magnification: 160x
Highest theoretical magnification: 160x
Limiting stellar magnitude: 12.2
Optical quality: Diffraction limited
Finder scope: EZ Finder II
Focuser: Internal
Diagonal degrees: 1.25" 90° Mirror Star
Mount type: Altazimuth
Tube material: Aluminum
Tripod material: Wood
Length of optical tube: 12.5 in.
Weight, optical tube: 2.9 lbs.
Weight, mount/tripod: 2.8 lbs.
Weight, fully assembled: 5.7 lbs.
Scope of Delivery:
Orion GoScope 80mm Refractor Telescope
90° star diagonal
20mm telescope eyepiece
10mm telescope eyepiece
EZ Finder II reflex sight
3/8"-to-1/4"-20 threaded adapter for tripod attachment
Starry Night Special Edition astronomy software
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http://www.mojteleskop.si/_item/1664/80mm_akromatski_refraktor_%28F=400mm%29_na_EQ-1_montazi.html
Skywatcher
80mm akromatski refraktor (F=400mm) na EQ-1 montaži
Maloprodajna cena: 169,00 € (40.499,16 SIT)
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Priporočam
http://www.teleskop-express.de/shop/product_info.php/info/p6827_Skywatcher-Heritage-100P---100mm---4--f4-Reise-Dobson-Teleskop.html
Skywatcher Heritage-100P - 100mm / 4" f4 Tabletop Dobsonian Telescope
instead 119,00 EUR
Description
Skywatcher Heritage-100P - 100mm / 4" f4 Tabletop Dobsonian Telescope
... Aperture 100mm - Focal length 400mm - parabolic main mirror
Skywatcher Heritage 100P
The compact Heritage-100P is a lightweight and convenient grab-and-go scope. With its quality 100mm f/4 parabolic optics, it can be used to view the Moon and bright planets and also has enough light gathering for the observation of star clusters, bright galaxies and nebulae. A 3/8" thread located on the base allows it also to used on a suitable field tripod. Supplied with gift box.
•Magnifications (with optics supplied): x16, x32, x40 & x80
•Diameter of Primary Mirror: 100mm (4")
•Telescope Focal Length: 400mm (f/4)
•Eyepieces Supplied (1.25"): 10mm & 25mm
•x2 Barlow Lens
•Parabolic Primary Mirror
•Red Dot Finder
•Rack and Pinion Focuser
•Wooden Alt-Azimuth Mount
•Weight Approx 2.8kg
http://www.teleskop-express.de/shop/product_info.php/info/p3936_Skywatcher-Startravel-80-400mm-refractor-with-EQ1-tablemount.html
Splača se dokupiti x3 Barlow:
http://www.teleskop-express.de/shop/product_info.php/info/p56_TSOptics-TSB31-3x-ED-Barlow-Lens---1-25-inch---3x-more-magnification.html
Skywatcher Startravel 80/400mm refractor with EQ1 tablemount
139,00 EUR
Description
Skywatcher best price guarantee:
It is our aim to offer Skywatcher products for the best price possible. Should you have seen this product elsewhere cheaper, please send this link to us: info@teleskop-service.de .
You will then get an individual offer within 24 hours!
Skywatcher Startravel-80 EQ1T / Travel scope 80/400mm with EQ1 tabletop mount ... a compact rich-field refractor - complete package with mount and tabletop tripod
Skywatcher Startravel 804 EQ1
The Skywatcher Startravel-80 EQ1 - a compact and powerful rich-field refractor. It delivers sharp and contrasty images with both astronomical and terrestrial observations. The wide field of view and the fast optical design open really new perspectives. No matter whether you perform nature observation in low light conditions or observe star clusters and galaxies in the deep sky - the powerful optics will enthuse you!
Meanwhile the Startravel-80 is very compact. The complete telescope and its mount find place in your board luggage at airline travels. Within a few minutes, the system can be divided into its single parts. The complete weight is less than 5 kg thus making the Startravel-80 an exceptional travel scope.
Startravel-80 EQ1T advantages:
-- Completely equipped astronomical telescope and spotting scope with minimum space consumption
-- Ideal for journeys and trips
-- Suitable for both astronomy and terrestrial observation
-- EQ1 German equatorial mount with tabletop tripod, operated via flexible shafts
-- Direct camera connection via T2 thread - turning the refractor into a 400mm f/5 telephoto lens
-- Extensive accessory package for a maximum of observation joy directly from the beginning
The compact EQ1 tabletop mount:
EQ1 travel mount
The EQ1 is a fully-fledged astronomical mount - but very compact what is essential for a lightweight travel mount. Flexible shafts for precise and vibration free tracking are standard and an electric tracking motor is available optionally. So even astro photography with short focal lengths is possible!
Scope of delivery:
-- 80/400mm rich field refractor with T2 connection
-- EQ1 tabletop mount with compact tripod
-- 1.25" star diagonal for comfortable viewing position
-- Two eyepieces: Super 25 for 16x and Super 10 for 40x magnification
-- 2x Barlow lens for doubling the magnification values
Technical details:
-- Aperture 80mm / Focal length 400mm / f/5
-- Multi-coated, air-spaced achromatic design
-- Resolution: 1.44"
-- Limiting visual magnitude: 11m3
-- 1.25" rack & pinion focuser with locking screw and T2 thread
-- EQ1 German equatorial mount with tabletop tripod
-- OTA weight: 1.6 kgs
-- Total weight: 6.5 kgs
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ZELO PRIPOROČAM
https://eu.telescope.com/Orion-StarMax-90mm-TableTop-Maksutov-Cassegrain-Telescope/p/103636.uts
ali
https://www.telescope.com/Orion-StarMax-90mm-TableTop-Maksutov-Cassegrain-Telescope/p/102016.uts
Orion StarMax 90mm TableTop Maksutov-Cassegrain Telescope
235,00 EUR
Description
Orion StarMax 90mm TableTop Maksutov-Cassegrain Telescope This telescope provides powerful views of the Moon and bright planets
Orion Maksutov-Cassegrain on Table-top Mount
This grab-and-go TableTop Maksutov-Cassegrain telescope provides powerful views of the Moon and bright planets such as Jupiter, Saturn, and Mars Weighing just 6.5 lbs. assembled, this compact telescope and base can be taken just about anywhere to provide great views of the night sky while on road-trips, camping, or the short trip out to the backyard. 90mm aperture Maksutov-Cassegrain telescope gathers enough light for beautiful views of brighter deep space objects like globular clusters, nebulas, and many bright galaxies. Nifty tabletop base provides a stable viewing foundation you can set on any sturdy table, or even attach it to a field tripod with a 3/8" or 1/4"-20 threaded post. Includes two 1.25" eyepieces (25mm and 10mm focal lengths), EZ Finder II reflex sight for easy aiming, 90° mirror diagonal for comfortable night sky viewing, and more!.
More Info:
Whoever coined the phrase "big things come in small packages", would have definitely applied that expression to the OrionStarMax 90 TableTop Maksutov-Cassegrain telescope. This ultra-compact Maksutov-Cassegrain gives surprisingly big views for an instrument of its modest size, making it an elegant first telescope or a pleasantly portable grab-and-go second telescope! The long, 1250mm focal length (f/13.8) gives the StarMax 90 TableTop telescope some serious magnifying power. The included 25mm and 10mm 1.25" 3-element eyepieces yield powers of 50x and 125x magnification, respectively. The 90mm diameter Maksutov-Cassegrain optical tube collects over 25% more light than its GoScope 80 refractor cousin, and up to 225% more light than a traditional beginner's 60mm refractor telescope. With the advantage of additional aperture, you'll be able to enjoy excellent, detailed views of planetary delights such as lunar landscapes, Saturn's rings and Jupiter's moons through the Orion StarMax 90mm TableTop Maksutov-Cassegrain telescope. As you scan the Milky Way, you'll also be able to pull in sparkling open and globular star clusters, as well as a bright nebula or two.
Specifications:
Optical design: Maksutov-Cassegrain
Optical diameter: 90mm
Focal length: 1250mm
Focal ratio: f/13.9
Optics type: Spherical
Eyepieces: 3-Element 25.0mm,10.0mm (1.25")
Magnification with included eyepieces: 50x, 125x
Resolving power: 1.29arc*sec
Lowest useful magnification: 13x
Highest useful magnification: 180x
Highest theoretical magnification: 212x
Limiting stellar magnitude: 12.5
Optical quality: diffraction limited
Finder scope: EZ Finder II
Focuser: Internal
Diagonal degrees: 1.25" 90° Mirror Star
Secondary mirror obstruction: 29mm
Secondary mirror obstruction by area: 10%
Mount type: Altazimuth
Tube material: Aluminum
Tripod material: Wood
Length of optical tube: 10.0 in.
Weight, optical tube: 3.7 lbs.
Weight, mount/tripod: 2.8 lbs.
Weight, fully assembled: 6.5 lbs.
Scope of delivery:
Orion StarMax 90 TableTop Maksutov-Cassegrain Telescope
90° mirror star diagonal
25mm telescope eyepiece
10mm telescope eyepiece
EZ Finder II reflex sight
3/8"-to-1/4"-20 threaded adapter for tripod attachment
Starry Night Special Edition astronomy software
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Omegon Dobson telescope MightyMak 60, 80, 90
Odsvetujem MightyMak 60 mm !!!
Zelo zanimiva ponudba Maksutov cevi (krajša gorišča), dobsonovo stojalo in dodatno mini trinožno stojalo, torbica - torej lahke in enostavno prenosne montaže, cevi premera: 60 mm, 80 mm, 90 mm
* http://www.astroshop.eu/omegon-dobson-telescope-mightymak-60/p,48816#tab_bar_0_select
* http://www.astroshop.eu/omegon-dobson-telescope-mightymak-80/p,48818#tab_bar_1_select
* http://www.astroshop.eu/omegon-dobson-telescope-mightymak-90/p,48819
od € 135.00 do € 185.00 (90 mm)
Priporočam dokup okularja 40 ali več mm in tudi od 6 do 10 mm.
Specifications (Omegon Dobson telescope MightyMak 60):
Optics
Type - Reflector
Type of build - Maksutov
Aperture (mm) - 60
Focal length (mm) - 700
Aperture ratio - 11,7
Resolving capacity - 2,3
Limit value (mag) - 11,1
Light gathering capacity - 73
Max. useful magnification - 120
Tube weight (kg) - 0,6
Eyepiece holder
Connection ( to eyepiece) - 1,25"
Type of build - Internal
Mount
Mounting type - Dobson
Type of build - Dobson
GoTo control - no
Tracking - no
Included accessories
Miscellaneous - Table tripod
1.25'' eyepieces - K 25mm
Prism rail - Vixen-Style
Carrying bag - yes
Deviating optics - 1.25", 90° star diagonal
Finder scope - Red dot finder
General
Series - MightyMak
Area of application
Moon & Planets - yes
Nebulae & galaxies - no
Nature observation - yes
Astrophotography - not recommended
Sun - not recommended (Only with appropriate Sun filter)
recommended for
Beginners - yes
Product description:
Omegon MightyMak: An elegant Maksutov telescope for astronomy and nature-watching
Do you want to be able to observe the Moon and planets but also landscape, trees and animals? The Omegon MightyMak is a compact all-rounder that is easy to use for almost all types of observing and for photography. Its compact length means it fits in virtually any bag. The MightyMak is the right telescope if you love both - the stars and nature.
The advantages in a nutshell:
* compact telescope with upright image for stars and nature
* coated front lens element minimizes reflections
* elegant design - glossy black with gold strips
* T-2 thread with buffer ring for an exact fit with your camera
* finder shoe for connecting the finder
* GP prism rail - fits tripod and all mounts with a GP profile
* Get started immediately - table-top tripod, 1 eyepiece and bag included
Multiple observing possibilities - at home and in the universe
It makes no difference to this Maksutov telescope whether you have a deer on the edge of a forest or a planet in its sights. You will discover, for example, the large moons and cloud bands on Jupiter. Saturn displays its huge majestic rings. You will also benefit from particularly sharp images with plenty of contrast due to the built-in coated Maksutov lens.
Bring the distant close - a telephoto lens for your camera
A T-2 thread lets you easily use the MightyMak as a telephoto lens. An additional T-Ring lets you connect your camera and shoot images at a long focal length. The buffer ring also ensures smooth docking to the telescope.
A bright images and large field of view
The MightyMak is a reflector telescope employing the Maksutov design. This telescope has a slightly shorter focal length as compared with models from other manufacturers. This has a positive effect, with a brighter image and a larger field of view.
Locating the goal - a shoe for your finder scope
The standard finder shoe provided will accept the most popular finder scopes - so you can decide yourself whether you prefer to use a red dot finder or an optical finder.
Prism rail for tripods and mounts
The prism rail provided lets you attach your telescope to any astronomical mount with a GP profile, which has become the standard fitting. Three 0.25" photo-threads make mounting onto a tripod a piece of cake.
Gentle clamping for 1.25" eyepieces
A 1.25" connection lets you attach any 1.25" eyepiece, even when from a different manufacturer. Your observing ultimately depends on using the correct magnification and having a comfortable viewing angle. A compression ring ensures that your eyepieces are firmly but gently held in place.
A package for getting started
With the Omegon MightyMak you also get a table-top tripod and an eyepiece - all together in a bag. So you can easily take everything with you anywhere - on a plane trip, on an excursion with a light rucksack or simply in your own garden for a trip to the Moon and planets.
Montaža (zelo uporabno)
Možnost nakupa zgolj montaže - recimo namizni Dobson (Mount Dobsonian mini base, € 29.90):
* http://www.omegon.eu/alt-azimuth-without-goto/omegon-mount-dobsonian-mini-base-with-synta-dovetail/p,46439
* http://www.omegon.eu/telescope-accessories/mountings-accessories/15_55
OPOZORILO - najmanjša izvedba namiznega Dobsona - Omegon Dobson telescope MightyMak 60 - ni primerna za astronomska opazovanja (slika planetov je pretemna ..., komaj se zazna Jupitrove lune, Saturn je le približno prepoznaven) !!!
MightyMak 60 pa je zelo primeren za dnevna opazovanja - je lahek in mobilen teleskopek.
Priporočam pa nakup: Omegon Dobson telescope MightyMak 90
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http://www.teleskop-express.de/shop/product_info.php/info/p5228_Skywatcher-Skymax-90-on-Tabletop-EQ1---90-1250mm-Mak.html
Skywatcher Skymax-90 on Tabletop EQ1 / 90/1250mm Mak
225,00 EUR
Description
Seen elsewhere cheaper? Please feel free to contact us and we will make an individual offer according to our European best price guarantee... info@teleskop-service.de
Skywatcher Skymax-90 Maksutov 90/1250mm on equatorial tabletop mount EQ1 - Travelmak 90 EQ1T ... a compact allround instrument for skywatching and terrestrial observations
Skywatcher Black Line 90mm Astromax Tabletop
The compact Maksutov of 90mm aperture is useful for nearly any application in amateur astronomy and nature observation. Being only 25cm long, it fits into air luggage and with his low weight it can be carried by compact mounts or photo tripods.
Observation
If you like spotting wildlife or stars in the sky, the SKM 90 performes convincingly in nearly all fields. 90mm aperture collect enough light for several hundreds nebulae and galaxies. The image has no colour fringing and a high contrast - well suitable to watch the moon and planets with fine details. Under ideal conditions you can magnify up to nearly 200x.
... a compact allround instrument for skywatching and terrestrial observations
Photography
The SKM 90 has a direct T-2 connection thread. So you can adapt your SLR camera using the camera specific T2 ring. Also digital compact cameras may be attached. The Star Max is comparable with a good quality telephoto lens of 1250mm focal length and f/13.9.
Technical data:
-- Aperture 90mm / focal length 1250mm
-- Focal ratio f/13.9
-- Limiting stellar magnitude 12.5mag
-- Resolution 1,3"
-- Tube length 25 cm
-- Tube weight 1,4kg
-- Tube diameter 10cm
-- Effortless internal focussing
-- Photo tripod connection bushing
-- 1,25" eyepiece connection
-- Red-dot finder to locate objects
SKM 90 on the EQ1 tabletop mount: a compact combination also for beginners
A suitable astronomical travel scope must be ...
... simple to use without any particular technical experience
... very versatile ... useful for any type of astronomical observation
... expandable with accessories as motor tracking - useful e.g. for photography
All those demands are fulfilled by the Maksutov on the EQ-1. The instrument is very lightweight, everything together weighs less than 10 kg, being very compact. This are ideal conditions for a lifelong friendship.
The EQ1 tabletopmount carries the 1,4kg tube well enough without vibration caused by slight wind or focusing.
Included:
red dot finder -- Maksutov Cassegrainian with 1,25" connection
-- Red dot finder for easy object location - the red dot locates the target (see image)
-- 1,25" mirror diagonal for upright images and convenient viewing location
-- 1,25" eyepieces Super 25mm and Super 10mm
-- EQ1 German equatorial mount (tabletop version)
Strahlengang Maksutov-Cassegrain
Practical tips from Teleskop-Service: The Maksutov Cassegrainian System
A Maksutov Cassegrain offers an image quality near to a classical refractor, while being very compact. The image is much better than using a fast achromatic refractor of the same aperture which suffers colour fringing. A Maksutov Cassegrain as a reflector does not show this fringing. The Maksutov Cassegrain is an interesting solution for stargazers who want a crsipy and contrast-rich image while using a compact instrument.
On the other hand, a Maksutov Cassegrain is relatively "slow", as the focal length is with respect to its aperture quite high. Hence the strength of the instrument is the observation of moon and planets. It is also a good performer for stellar clusters, nebulae and galaxies but it does not offer a particular large field of view. Very extended objects as the Pleyades cannot be seen all at once.
The optical system - see diagram:
Light enters the system through the front end meniscus lens before hitting the spherical primary mirror. The spherical aberration of the primary is corrected by the meniscus lens. So there is a very sharp image on axis and in the field. A further advantage is that the front end lens seals the tube. A sealed tube is less sensitive for temperature changes.
The secondary mirror at the front element reflects the light back through the perforation of the primary, entering the eyepiece located behind the primary mirror. The secondary also increases the effective focal length of the system, comparable to a tele converter in photography.
Focusing:
The system is focused by translation of the primary mirror using a micrometric screw. This type of focusing has strong advantages, as a standard focuser is not necessary and the focusing range is very large. Nearly every part of equipment you can think of will get into focus of this Maksutov telescope.
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http://www.teleskop-express.de/shop/product_info.php/language/en/info/p1052_Skymax-102-OTA---102-1300mm-Maksutov-Cass----optischer-Tubus.html
Skywatcher Skymax-102 OTA Maksutov-Cassegrain Telescope 102 mm (4 Inches) f/1300
255,01 EUR
Description
This compact Maksutov with 102mm aperture is suitable for many astronomical and terrestrial applications. With only 28cm length it fits into your airline board luggage. With its light weight of 1.9kg it can be mounted on slim mounts and photo tripods.
Observing
No matter whether you watch stars or birds - the SKM102 convinces in all fields. 102mm free aperture gather enough light for hundrets of nebulae and galaxies. It has no disturbing colour fringes and enough contrast for lunar and planetary observations at high magnifications. Under ideal atmospheric conditions, magnifications up to 250x are possible.
Photography
The SKM 102 has direct T2 connection. With a fitting T2 ring you can attach your (D)SLR camera directly. Compact digital cameras with fixed objectives can also be adapted. This telescope is comparable with a good tele objective with 1300mm focal length and f/12.7.
Specifications:
-- Aperture 102mm / focal length 1300mm
-- Photographic speed f/12.7
-- Limiting visual magnitude 12m7
-- Resolution 1.15"
-- Tube length 27cm
-- Tube diameter 12cm
-- Tube weight 1.9kg
-- Main mirror focusing
-- Connection thread for photo tripods
-- 11" eyepiece receptacle
-- Red dot finder for quick target aquisition
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Dilema o pravilnosti orientacije slike pri teleskopih
Teleskpo da obrnjeno sliko. A ta dilema (navidezna težava) je za astronome irelevantna (važna sta svetlost slike in ločljivost - kontrast), a obrnjena slika zmeraj znova zmoti začetnike ali tiste, ki si želijo opazovati zemeljske objekte (naravo, hribe, ...). V ta namen lahko dokupite recimo Amici-jevo prizmo ("right angle roof prisms") - ki sliko teleskopa pravilno obrne - ali daljnogled, ki ima že vgrajeni prizmi za pravilno orientacijo slike. So pa na trgu dostopni tudi t. i. "Spotting Scopes" - spektivi - to so večinoma manjši teleskopki do nekje 100 mm premera s pokončno sliko. A moramo opozoriti, da vsaka dodatna optična površina zmanjšuje svetlost slike - tudi dodatna prizma odbije del svetlobe. Za dnevno gledanje nekoliko zmanjšan procent prepuščene svetlobe ni pomemben, pri opazovanju nočnega neba pa je količina svetloba bistvena (pri meglicah, galaksijah, kopicah, ...).
Ena izmed opcij - refraktor premera 80 mm, gorišča 330mm - z Amicijevo prizmo. Luštna prenosna naprava za povečave nekje do 100X. Z njim se lepo opazuje zemeljske objekte in tudi nočno nebo - seveda svetlejše objekte.
TSFRE1280Ws
14x80 angled finderscope - erect image - optional illumination
239,00 EUR
http://www.teleskop-express.de/shop/product_info.php/info/p1398_14x80-angled-finderscope---erect-image---optional-illumination.html
14x80 Angled Finderscope - 90° - Erect Image - illuminator optional - including finder bracket High End angled finderscope with very good image quality. Uses 1.25" eyepieces. Erect image.
TSFRE1280WS
The TSFRE1280Ws is more than just a simple finderscope. It is almost a complete telescope in its own right. Many hundred deep sky objects are directly visible with this instrument.
Of course this finder has many possible applications. The most important one is deep sky observing with large telescopes. With standard 50mm finders it might prove too difficult to locate the objects you wish to observe.
Advantages and Features of the finder:
-- Sharp, high contrast image. Multicoated achromatic optics.
-- Easy focusing with helical focuser for the eyepiece
-- 1.25" adaptation for standard eyepieces. You can use almost all 1.25" eyepieces with this instrument.
-- robust CNC machined finder bracket with quick release function.
-- With the optional illuminator you can illuminate the reticle of the supplied eyepiece.
-- Erect image - not upside down or mirror reversed.
-- The viewing position can be rotated 360° without unlocking the finder in the adjustable bracket.
Specifications of the finder:
-- Aperture ... 80mm
-- Focal Length ... 330mm
-- Magnification with the supplied eyepiece ... 14x
-- Apparent field of view with the supplied eyepiece ... 55°
-- True field of view on the sky ... 4° (8x the diameter of the full moon!)
-- Weight without bracket ... 1047 grams
-- Weight with bracket ... 1406 grams
Adaptation of the finder base to the telescope:
The finder base has three 4mm holes along the center axis. The distance between the holes is 20mm center to center. It is possible to adapt it to most telescopes using at least one of the three screw holes. A big advantage: Accepts 1.25" eyepieces:
This finder accepts standard 1.25" eyepieces. You can easily reach higher magnifications up to about 100x with the proper eyepieces. The optical quality is very good, which allows you to use the finder for rich field deep sky observing.
Advantage for Astro Imaging:
If you have a camera with a small sensor you know that centering the object in the camera's field of view can be tricky. A finder with 8x magnification is not precise enough. By using the right eyepieces you can center the object very precisely with this finder.
23mm Reticle Eyepiece - illuminator available optionally:
This high quality eyepiece is worth an own paragraph. It is a very nice wide angle eyepiece with a precisely engraved crosshair. An optional illuminator can be screwed in from the side.
.................................. Illuminator for the 26mm Reticle Eyepiece
Specifications of the eyepiece:
-- Barrel size ... 1.25"
-- Focal length ... 23mm
-- Apparent field of view ... 55°
-- Thread for standard illuminator
-- fully multi-coated
Hands-on advice from Teleskop-Service:
You can use the eyepiece on your main telescope as well! It is well suited for centering stars precisely during goto alignment. It could even be used for photo guiding short focal lengths.
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Namizni teleskopi od 100 mm do 150 mm premera (izjemoma lahko tudi 200 mm)
Poudarimo, da se teleskope do 150 mm večinoma da pritrditi v enoročne Dobsonove montaže, ki pa žal niso dosegljive direktno na tržišču, ampak jih kupimo skupaj s teleskopi in nato nanje naknadno (po potrebi) pritrdimo ustrezne optične cevi (Maksutov-Cassegrain, Schmidt-Cassegrain [SC], refraktor, H-alfa teleskope ...). Spodaj pod točko 1 sta na enoročni Dobsonovi montaži pritrjena H-alfa teleskopa za opazovanje aktivnosti Sonca. Montaži sta od Firstcopa (40 EUR) in od teleskopa Newtna SkyScanner 100/400, ki ima odlično montažo z univerzalno vpenjalno glavo.
Potrebno je poudariti, da so namizni Dobsoni vedno bolj popularni - še pred kratkim zapriseženi ljubitelji goto montaž ali cevi velikih premerov, so spoznali izjemno uporabnost namiznih teleskopov. Marsikaj nam cevi do 150 mm premera pustijo skrito (prikrito), a zaradi svoje lahkosti in mobilnosti omogočajo opazovanja takoj in kjer koli - kar pa šteje. Velik teleskop doma v kleti ali garaži nam nič ne pomaga ...
Nekatere cene so podane tudi v "US" dolarjih, a tem cenam je potrebno prišteti vsaj 30% do 50% stroškov - poštnina, EU davek ... Nekaterih artiklov pa sploh ni moč kupiti v ZDA - jih ne pošiljajo v Evropo. To samo kaže na razliko med ekonomijami in na strateški politični položaj celin ... Ker je večina opreme narejene na Kitajskem, se je že izkazalo, da so cene optike v EU vsaj 2x previsoke - trgovci blazno nabijajo marže. Je pa vprašanje časa, kdaj bo ta trgovski monopol zahoda padel ... ali pa tudi ne.
Pretvorba dveh enot:
1.0 lbs = 0.453592 kg = 0.454 kg
1" = 2.54 cm
Nekoliko večji namizni teleskopi (pogojno gredo tudi v nahrbtnik):
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Slika: Na enoročni Dobsonovi montaži sta pritrjena H-alfa teleskopa (Lunt 60 mm (2000 EUR) in 35 mm (500 EUR)) za opazovanje aktivnosti Sonca. Montaži sta od Firstcopa (desno - 40 EUR) in od Newton SkyScannerja 100/400 (levo - 136 EUR), ki ima odlično montažo z univerzalno vpenjalno glavo.
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http://www.optcorp.com/orion-apex-127mm-maksutov-cassegrain-telescope.html
$432.99
Orion Apex 127mm Maksutov-Cassegrain Telescope
ali
Celestron OMNI Schmidt Cassegrain 127/1250mm - OTA with prism rail and viewfinder
Specifications:
Manufacturer Orion
Telescope Series Orion Apex
Optical Design Maksutov-Cassegrain
Mount Type None - Optical Tube Only
Warranty 1 Year Warranty
Telescope Aperture 127mm
Telescope Focal Length f/12.1
Telescope Focal Ratio 1540mm
Highest Useful Magnification 254X
Limiting Stellar Magnitude 13.2
Tube Color or Finish Orion Maroon Pearl
OTA Mount Type Photo Tripod Adaptable
Length of Optical Tube 14.5"
Optical Tube Weight 8.6 lb
Tripod Type Included None, Sold Separately
Eyepiece(s) Included 25mm Sirius
Case Included? Yes
Diagonal Included? Yes - 1.25" Erect Image Diagonal
Power Adapter Included None - Does Not Require Power
Finder Included 6 x 26 Optical Finder
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http://www.optcorp.com/orion-apex-102mm-maksutov-cassegrain-telescope.html
$308.99
Orion Apex 102mm Maksutov-Cassegrain Telescope
Optical Tube Weight 5 lbs.
Length of Optical Tube 11"
Quick Overview
The Orion Apex 102mm Maksutov-Cassegrain Telescope is small enough to store on a bookshelf but with the power of traditional scopes five times its size!
102mm aperture and 1300mm focal length for fantastic celestial and terrestrial views.
The Orion Apex 102mm Maksutov-Cassegrain Telescope includes one eyepiece, finder scope, diagonal, case, and FREE Starry Night astronomy software!
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http://www.optcorp.com/celestron-c6-a-xlt-schmidt-cassegrain-optical-tube-assembly-91010.html
$429.00
Celestron 6" Schmidt-Cassegrain OTA with CG-5 Mount Plate
Specifications:
SKU CE-91010-XLT
Manufacturer Celestron
Telescope Series Celestron Optical Tubes
Optical Design Schmidt-Cassegrain
Mount Type None - Optical Tube Only
Warranty 2 Year Warranty
Telescope Aperture 5.91"
Telescope Focal Ratio f/10
Telescope Focal Length 1500mm
Limiting Stellar Magnitude 13.4
Highest Useful Magnification 354x
Optical Coatings Celestron XLT
Tube Color or Finish Celestron Grey
Optical Tube Outer Diameter Not provided by manufacturer
Length of Optical Tube 16"
Optical Tube Weight 10 lbs.
Mount Weight N/A
Diagonal Included? Yes - 1.25" Star Diagonal
Finder Included 6 x 30 Optical Finder
Eyepiece(s) Included 25mm
OTA Mount Type CG-5 Dovetail
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http://www.optcorp.com/open-box-celestron-nexstar-8se-telescope-ota-only-7976.html
$699.00
Open Box Celestron NexStar 8SE Telescope OTA Only
ali
Celestron 8" Schmidt-Cassegrain OTA with CGE Mount Plate ($799.00)
Teleskop gre (paše) pogojno na enoročno namizno montažo. Premer objektiva 200 mm pa pomeni že izjemen optično-svetlobni preskok - ločljivost se poveča, mejna povečava tudi, mejna magnituda je teoretično že nad 13, realno pa okrog 11. Cev je relativno draga - zakaj? - ker je teleskop zelo kompakten, mobilen in lahek - je ena najbolj uspešnih optičnih cevi v zgodovini amaterske astronomije.
Specifications:
SKU UT-7976
Manufacturer Used Equipment
Telescope Series Celestron Nexstar SE
Optical Design Schmidt-Cassegrain
Warranty 2 Year Warranty
Telescope Aperture 8"
Telescope Focal Ratio f/10
Telescope Focal Length 2032mm
Limiting Stellar Magnitude 14
Highest Useful Magnification 480x
Optical Coatings Celestron XLT
Tube Color or Finish Celestron Classic Orange
Length of Optical Tube 17"
Optical Tube Weight 12.5 lbs.
Spodnji teleskopi skoraj obvezno potrebujejo x3 Barlow:
http://www.teleskop-express.de/shop/product_info.php/info/p56_TSOptics-TSB31-3x-ED-Barlow-Lens---1-25-inch---3x-more-magnification.html
ali kratkogoriščne okularje, ki pa so veliko dražji (če hčemo spodobno zenico) !!!
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https://www.astroshop.eu/telescopes/orion-dobson-telescope-n-114-450-starblast-4-5-astro/p,6195
231,00 EUR*
Orion StarBlast 4,5 - Dobsonian - aperture 114mm / focal length 450mm
Technical data and equipment included:
Aperture / focal length / ratio: 113mm / 450mm / f/4
Primary mirror parabolic - for a particular high image definition
Secondary mirror holder - four thin vane arms to minimize the obscuration
Max. useful power - about 200x due to the precise mirrorl
Focuser - 1,25" - very short and compact design
Finder - Star Pointer - red dot finder
Eyepieces - RK 17 for 26x and RK 6 for 75x
Furthermore included - Alignment aid, eyepiece holder, rigid alt-az mount
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http://www.teleskop-express.de/shop/product_info.php/info/p1890_Orion-StarBlast-6-Astro-Telescope---Travel-Dobsonian-6--Aperture.html
381,00 EUR
Orion StarBlast 6 - Dobsonian - aperture 150mm / focal length 750mm
Technical data and includedaccessories:
Aperture / focal length / ratio: 150mm / 750mm / f/5
Primary mirror - parabolic - hence particular high image quality
Secondary mirror holder - four thin vane arms minimize obscuration
Max. useful magnification - about 300x due to the precise parabolic mirror
Limiting visual stellar magnitude: 13,6mag
Resolving power: 0,77"
Focuser - 1,25" focuser - metal with direct photo connection
Finder: Star Pointer - red dot finder
Eyepieces - Sirius Plössl 25mm / Sirius Plössl 10mm
Furthermore included - Eyepiece tray, solid alt-azimuth mount
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http://www.teleskop-express.de/shop/product_info.php/info/p7486_Orion-StarBlast-114mm-AutoTracker-Reflector-Telescope.html
314,00 EUR
Orion StarBlast 114mm AutoTracker Reflector Telescope
Winning combination of a 114mm reflector telescope and the StarBlast AutoTracker Mount
Ample aperture for great views of the Moon and planets as well as brighter nebulas, star clusters and other deep space curiosities
StarBlast AutoTracker Mount tracks the object you're observing until you're ready to move on to the next one.
A great portable reflector telescope setup for astronomy buffs on-the-go
Includes 25mm and 10mm 1.25" eyepieces, EZ Finder II reflex sight, cell phone adapter bracket, L-bracket with extension for DSLR cameras, Canon shutter release cable, and more
Specifications:
Optical design: Newtonian Reflector
Optical diameter: 114mm
Focal length: 500mm
Focal ratio: f/4.4
Optics type: Parabolic
Glass material: Soda-lime plate
Eyepieces: Super Plossl 25.0mm,10.0mm (1.25")
Resolving power: 1.02arc*sec
Lowest useful magnification: 16x
Highest useful magnification: 228x
Highest theoretical magnification: 228x
Limiting stellar magnitude: 13.0
Finder scope: EZ Finder II
Focuser: 1.25" Rack-and-pinion
Secondary mirror obstruction: 34mm
Secondary mirror obstruction by diameter: 30%
Secondary mirror obstruction by area: 9%
Mirror coatings/over-coatings: Aluminum & Silicon Dioxide
Mount type: Altazimuth
Astro-imaging capability: Simple moon shots
Computerized compatibility: Go-To system
Tracking rates: Sidereal
Motor type: DC Servo motors with encoders
Power requirement: 8-AA batteries or 12-volt DC
Available ports: RS-232
Tube material: Steel
Length of optical tube: 16.5 in.
Weight, optical tube: 3.9 lbs.
Weight, mount/tripod: 8.5 lbs.
Weight, fully assembled: 12.4 lbs.
Scope of Delivery:
Orion StarBlast 114mm Reflector Telescope optical tube assembly (OTA)
Orion StarBlast AutoTracker Altazimuth Mount
L-bracket
L-bracket extension
Canon DSLR shutter release cable
Cell phone adapter brakcet
EZ Finder II reflex sight
10mm 3-element 1.25" telescope eyepiece
25mm 3-element 1.25" telescope eyepiece
Compass
Collimation cap
Starry Night Special Edition astronomy software
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Zelo praktičen - zložljiva cev
http://www.teleskop-express.de/shop/product_info.php/info/p2705_Skywatcher-Heritage-130P-FlexTube-Dobson---6years--.html
189,00 EUR
Skywatcher Heritage 130 - Black Diamond Line Dobsonian with 130mm Aperture and Parabolic Primary Mirror
Specifications:
-- Aperture 130mm / Focal Length 650mm / Focal Ratio f/5
-- Diffraction limited optics, parabolic primary mirror
-- 1.25" focuser for standard accessories
-- Maximum recommended magnification approx. 220x
-- Limiting magnitude 13.3 mag
-- Resolving power 0.9" (seconds of arc)
-- Tube length: 37cm fully retracted
-- Total weight: approx. 7kgs
-- 2" dovetail rail mounted on the OTA
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Aperture: 130 mm
Focal length: 650 mm
Focal ratio: f/5
Primary mirror: Parabolic primary mirror
Magnification with supplied eyepieces: 26x and 65x
Maximum useful magnification: 220x
Light gathering capacity compared to the entry-level 114 mm telescope: 130%
Limiting magnitude: 13.3 mag
Resolution: 0.92"
Secondary mirror diameter: 39.8 mm
Obstruction: 30.6%
Focusing: Helical focuser
Tube weight: 2.5 kg
Connection of the tube to the mount: Vixen/EQ5 style dovetail bar
Mount: Alt-azimuth Dobsonian table mount
Weight of the mount: 3.7 kg
Finder: Red-dot finder
Total weight: approx. 6.2 kg
Shipping weight: 8.7 kg
Shipping size: 53x40.5x40.5 cm
Scope of Delivery:
-- Skywatcher Dobsonian 130/650mm
-- Starpointer red dot finder
-- Eyepieces 25mm (26x) and 10mm (65x)
Skywatcher Black Diamond Dob 130 ... Skywatcher designed this telescope for the International Year of Astronomy (IYA) - it is not an undersized mini-telescope that might show just a handful of objects, but it is a powerful telescope for a lifetime of enjoyment in a still extremely portable body. With its 130mm parabolical primary mirror you can view thousands of objects.
With its clever patented extendable truss tube design the telescope is extremely portable. Fully retracted the tube is only 37cm in length! Setup takes only minutes and can easily be done without special tools.
What objects can you see?
With its parabolic mirror with 130mm aperture the Heritage has an excellent image quality for stunning views of the moon and the planets:
-- Phases of Mercury and Venus
-- Details on Moon's surface
-- Polar caps of Mars
-- Great Red Spot and cloud bands on Jupiter
-- Rings of Saturn, including the famous Cassini divisioni
Beyond our solar system thousands of star clusters, gas nebulae, planetary nebulae and galaxies are within reach of this telescope. You can see much more than in the ubiquitous 114mm Newtonian.
Easy Operation: The Heritage is a Dobsonian-style telescope. As a consequence it is very easy to use. -- Just place the telescope on a rigid flat surface, e.g. a strong table or the ground
-- Pull the tube to its fully extended position
-- Insert an eyepiece and enjoy observing!
You can point the telescope at any point in the sky with left-right and up-down movements. With a little practice it is easy to follow the movement of the objects even at maximum magnification.
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Zelo praktičen - zložljiva cev, enako kot zgoraj - a zaznavno večji, 150 mm premera (Zelo PRIPOROČAM, ker je optika še zmeraj prenosna, a zelo zmogljiva, edina težava je lahko zaradi morebitne stranske svetlobe, če opazujemo kje v naselju ..., da se pa zuanji del cevi "obleči" ...)
https://www.teleskop-express.de/shop/product_info.php/language/en/info/p12279_Skywatcher-Dobson-Teleskop-Heritage-150P-Flextube---150-mm-Oeffnung.html
250,00 EUR
Skywatcher Dobson Telescope Heritage 150P Flextube - 150 mm Aperture
Specifications:
Aperture: 150 mm
Focal length: 750 mm
Focal ratio: f/5
Primary mirror: Parabolic primary mirror
Tube weight: 3.5 kg
Connection of the tube to the mount: EQ5 style dovetail bar
Mount: Alt-azimuth Dobsonian table mount
Weight of the mount: 4 kg
Shipping weight: 10.2 kg
Shipping size: 63x42x42 cm
In the box:
¦ 150 mm Newtonian telescope
¦ Dobsonian mount
¦ Red-dot finder
¦ Collimation eyepiece
¦ Eyepieces: 10 mm & 25 mm
¦ Gift box
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Meade Dobson telescope N 130/650 LightBridge Mini 130
http://www.astroshop.eu/meade-dobson-telescope-n-130-650-lightbridge-mini-130-dob/p,54287
€ 279.00
Enaka optika, a nekoliko drugačna izvedba kot pri Skywatcher-130P-FlexTube (ni motenj stranske svetlobe, fokuser je standarden, a morebiti nekoliko manj precizen od modela Skywatcher-Heritage-130P-FlexTube-Dobson). Priporočam pa "Meade Dobson telescope N 130/650 LightBridge Mini 130", čeprav je nekoliko dražji.
Dokupite x2 Barlow za planete, Luno.
Specifications:
Series LightBridge Mini
Warranty 1 Year
Experience Level Beginner
Clear Aperture 130mm
Optical Design Newtonian Reflector (Parabolic)
Focal Length 650mm
Focal Ratio f/5
Resolving Power (Dawes' Limit) 0.89 arc-seconds
Viewfinder Red Dot
Eyepiece(s) 1.25" MA 9mm (72x) & MA 26mm (25x)
Focuser Mechanism 1.25" Rack and Pinion
Dovetail Vixen-Style
Assembled Product Dimensions 14.6" x 13.9" x 30.1"
Assembled Product Weight 13.6 lbs = 6,17 kg
Nekaj priporočil, ki jih pošljem začetnikom (eden od primerov):
a.) Cev se mora dovolj čvrsto pritrditi na stojalo - da slučajno ne pade ...
b.) Mizica ali stol kamor postavita teleskop se ne sme majati, in da ima površino dovolj veliko, da teleskop ne zdrsne na tla ...
c.) Da se cev zmeraj zapre s pokrovčkom, in da je obrnjena poševno navzdol ali vodoravno, da prah ne pada direktno na primarno ogledalo.
d.) Priporočam, da se cev zmeraj pokrije, recimo s priloženo vrečko (prah škodi optiki) - če je vlažno, se teleskop in okularji lahko med opazovanjem orosijo, vlage se ne briše iz optike (!!!!), lahko se jo s fenom "odpihne" iz površin ali telskop zgolj prenese v topel prostor, da se sam posuši.
e.) OPAZOVANJA
- objekt lahko začnete ciljati z laserjem (ni nujno, a pomaga), nato z iskalom - najprej naj bo v teleskopu najdaljši okular 26 mm (650mm/26mm = 25 x je najmanjša povečava), da imate veliko polje in tako sliko v okularju lažje najdete in z rahlim premikanjem cevi centrirate,
- nato pa lahko vstavite okular 9 mm (650mm/9mm = 72 x povečava), - Barlowa leča pa vam še omogoča podvojitev povečav (2x25 je 50x in 2x72 je 144x),
- povečava 72 x je velikokrat dober kompromis, pri planetih in Luni pa bo povečava 144x velikokrat ponudila največ (slika je odvisna tudi od mirnosti ozračja in seveda od svetlobne onesnaženosti),
- povečava 25x pride prav recimo za Andromedino galaksijo M31, Plejada M45, Hijade, za ostale razsute kopice M35 v Dvojčkih, Jasli M44 v Raku, ...
f.) VADITE ČEZ DAN, večkrat sestavite teleskop, poiščite kake oddaljene objekte (recimo stolp na Krimu, oddaljene zgradbe, naravo), menjajte okularje, uporabljajtae Barlowo lečo, - če dan ni ravno jasen, vama velike povečave dajo precej zamegljeno sliko pokrajine, oddaljenih objektov (da se ne bi ustrašili, da je kaj narobe s teleskopom ...)
g.) "Centrirajte" žarek - umerita iskalo - to kar je vidno v okularju, tja mora biti usmerjena rdeča pika iskala (iskalo se pred vsakim opazovanjem preveri in po potrebi centrira - z dvema koleščkoma na iskalu).
h.) Toplo vam priporočama uporabo naše ADV ZVEZDNE KARTA (A3), pa seveda tablice, prenosnika, itn.
i.) Kdaj se splača videno tudi sproti risati (recimo planet, njegove lune, Jupitrove proge, podrobnosti v Saturnovih obročkih, kraterje na Luni - recimo Platon, Zaliv mavric, Kepler, Kopernik, Tycho, Clavius, celo našega Vego); z risanjem opazite veliko več podrobnosti.
j.) KUPITE SI ALU. KOVČEK (bauhaus - btc) ZA:
- daljnogled, okularje, (rdečo naglavno) baterijo, za zvezdno karto, laser, pa še kaj se da not (vse omenjene stvari vzamita s sabo in se bosta tako lažje odločila za velikost kovčka (nekje A3 format); lahko tudi sami oblikujete (izrežete ustrezne oblike) gobo v kovčku; S tem si boste olajšali varno prenašanje opreme - pa še veliko močno vrečo (šport 2000) za cev teleskopa si kupite, not dajta kako gobo za zaščito ...
k.) Čaj, topla obleka, obutev, šal, rokavice, kapa pa so v primeru nizkih temperatur nujna oprema vseh radovednežev ob teleskopu.
Pa veliko veselja z iskanjem in opazovanjem nebesnih lepot, skrivnosti.
Priporočena oprema za uvod v astronomijo (1 - enostavna prenosna oprema, 2 - oprema za opazovanje na vrtni terasi ...)
Vsak, ki se nekoliko resneje ukvarja z opazovalno astronomijo, ima vsaj dve napravi za opazovanja skrivnosti neba. To sta:
- binokular (kdaj ga poimenujemo tudi kar daljnogled)
in
- teleskop.
Enostavna prenosna oprema (cena skupaj okrog 300 EUR)
Priporočamo binokular 15X70, z vidnim poljem 4.4° (recimo: skymaster-15x70-binocular)
IN
namizni teleskop premera 90 mm Maksutov-Cassegrain (goriščna razdalja 1250 mm, f/13.9) (recimo: 90mm-TableTop-Maksutov-Cassegrain-Telescope).
Daljnogled tehta 1361 g. Pri teleskopu "90mm-TableTop-Maksutov-Cassegrain" zelo priporočamo dokup okularja 40 mm, tako bomo pridobili povečavo okrog 31x, kar je idealno za razsežnejše objekte (razsute kopice, Andromedino galaksijo, itn).
Masa cevi (Tube weight) je 1.68 kg, dolžina cevi (Tube length) je 254 mm in masa namizne Dobsonove montaže je v tem primeru (Rockerbox mount weight) je 1.27 kg. Skupaj ima sestavljen teleskop maso zgolj 2.95 kg.
Teleskop omogoča povečave tja do 150x, lahko tudi 200x, a bo slika zelo temna. Spodnja še smiselna povečava je okrog 14x - a bi rabili okular gorišča 90 mm (1250mm/14mm), kar pa ni smiselno ...
-
Oprema za na vrt (cena skupaj okrog 450 EUR)
Priporočamo (kot že prej) binokular 15X70, z vidnim poljem 4.4° (recimo: skymaster-15x70-binocular)
IN
zmoglivejši teleskop 200 mm premera (tip Newton, goriščne razdalje 1200 mm, f/6) (recimo: GSO-Dobson-Teleskop-200C).
Daljnogled ima maso 1361 g. Pri teleskopu "gso-dobson-8" zelo priporočamo dokup okularja 10 ali manj 'mm' in tudi Barlowe leče za 2x-no (ali 3x) povečanje goriščne razdalje (opazovanje planetov, bližnjih dvojnih zvezd, kroglastih kopic, itn). Teleskop ob dobrih pogojih (mirno ozračje) omogoča povečave tja čez 300x. Spodnja še smiselna povečava je okrog 30x (manjše povečave so zelo primerne za razsežnejše nebesne objekte - razsute kopice, Andromedino galaksijo, itn ).
Masa cevi (Tube weight) je 9.5 kg, dolžina cevi (Tube length) je 1150 mm in masa Dobsonove montaže je v tem primeru (Rockerbox mount weight) 9.5 kg. Skupaj ima sestavljen teleskop maso okrog 19 kg.
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Noben od teh teleskopov nima računalniškega vodenja (go-to opcije), nebesne objekte moramo toraj poiskati sami (s pomočjo iskala in zvezdne karte). A to je za učenje orientacije na nebu prav prima metoda in človek na tak način zares spozna nebo, nebesne objekte in to znanje (izkušnja) mu dvigne smozavest - mu je za celo življenje v veliko veselje. Optično je 200 milimetrski "gso-dobson-8" teleskop (Newton) precej zmoglivejši - in ga za to ceno zelo priporočam. Edino kar je lahko problem, sta njegova velikost in masa - 19 kg.
Manjši teleskop "90mm-TableTop-Maksutov-Cassegrain" z maso zgolj 2.95 kg pa je izredno mobilen. Je zelo soliden za Luno in planete - za kopice, meglice in galaksije pa nekoliko manj - a še zmeraj se da z njim opazovati vse Messierjeve objekte.
Še o filtrih za opazovanje Sonca. Torej - Sonce se opazuje zgolj s posebej za to izdelanimi filtri (recimo iz mylar folije), pritrjenimi (ob robu prilepljenimi) na vhodni odprtini teleskopa (na objektivu). Direktno opazovanje Sonca (brez filtra na teleskopu) pomeni takojšnjo slepoto !!! Filter za opazovanje Sonca se mora zmeraj dokupiti.
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Še nekaj besed o binokularjih
Binokular je relativno majhna in lahka prenosna naprava. Z binokularjem lahko večinoma opazujemo kar iz roke, kar je zelo udobno, praktično, vsekakor pa je stojalo zmeraj prava rešitev za daljša opazovanja. Binokular (daljnogled) ima veliko vidno polje (okrog 5 stopinj) in tako lahko z njim opazujemo večje strukture na nočnem nebu (razsute kopice, večje meglice, bližnje galaksije, svetlejše kroglaste kopice, ...) in hkrati je slika zaradi gledanja z obema očesoma boljša, saj se tako napake obeh očes precej izničijo (vsaj za 20% je slika boljša skozi binokular, kot če opazujemo samo z enim očesom). Binokular je optična naprava, ki je sestavljena iz dveh enakih manjših daljnogledov (teleskopov), ki sta združena na očesni razdalji in skupaj omogočata prostorsko gledanje v isto smer. Sestavljajo ga - dva objektiva, dve prizmi, ki sliko "pravilno" obrneta in dva okularja. Večinoma se pri desnem okularju da korigirati razliko v dioptriji med očesoma. Ostrenje slike pa je večinoma centralno preko koleščka med optičnima tubusuma. Večinoma se pri cenejših daljnogledih ne da menjati okularjev in je povečava zato fiksna. Pri binokularjih je pomebnih več karakteristi: premer objektivov (priporočamo vsaj 50 mm ali več), povečava (priporočamo od 8X do 16X), vidno polje (priporočamo 4° do 7°, odvisno od karakteristik), izhodna zenica (priporočamo manj kot 7 mm in več kot 4 mm), razdalja do očesne zenice, najmanjša razdalja do ostre slike, antirefleksni sloji (priporočamo Multi-Coated še bolje, a dražje, fully multi-coated), prizme (priporočamo BaK4).
Na binokularjih najdemo zabeležene osnovne podatke v zgoščenem zapisu (recimo: 15X70, Angular Field of View - FOV 4.4°). Kar pomeni, da je povečava 15 kratna, premer objektivov (leč) je 70 mm, in da je vidno polje binokularja 4.4° (stopinje). Ali recimo zapis: 10X50, FOV 6.4° - sami opišite karakteristike takega binokularja (daljnogleda), ki je za mnoge zakon.
Kot nujen pripomoček rabimo še zvezdno karto - sploh začetniki. Priporočamo ADV zvezdno karto Messierjevega, Caldwellovega, M+M kataloga - A3
(od 2014 je na razpolago tudi vsem ostalim ljubiteljem astronomije, izsek iz karte je spodaj)
Povzel: ZV
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