hi, i don't understand why the 2 converging lens telescope's magnification is given by M = f_o / f_e(adsbygoogle = window.adsbygoogle || []).push({});

where f_o = focal length of objective, and f_e = focal length of eyepiece...

issn't M = image distance / object distance...

in the case of a infinity object, the image is also infinity for the eye to view it without straining.

so why is there still a magnification ? infinity over infinity?

need help thanks a lot!

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# Stargazing Magnification of telescope

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