View Single Post
Mar5-08, 01:07 PM
P: 65
A question about telescope

Magnification = telescope focal length / eyepiece focal length

There are many practicalities surrounding eyepiece construction; field of view, eye relief, exit pupil size, lens fabrication etc. that dictate a minimum feasible eyepiece focal length. Thus, the only reasonable thing to do if you want to increase magnification is to increase the telescope's focal length.