Magnification of Eyepieces

Mirror Diameter (inches) user input
Focal Ratio (f/#) user input
Focal Length (inches)
Focal Length (mm)
Aperature (sq inches)
Barlow (x) user input


Eyepiece (mm)

Magnification (x)

Exit Pupil (mm)
mm
55 mm
40 mm
32 mm
26 mm
20 mm
15 mm
12.5 mm
9.7 mm
6.4 mm
4.8 mm

The above table indicates eyepiece magnification. Also shows exit pupil. A negative magnification number means the eyepiece either goes below 5x to the inch, or above 50x to the inch. In other words, overkill.

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This web site was last updated 03/06/02