A telescope is used for viewing far distant objects. Therefore, we are interested in increasing the anlge subtended by an object or we are interested in the angular magnification with a telescope. The linear magnification is somewhat meaningless in this context.
The front, or objective, lens produces a real image. This real image is then viewed and enlarged by the eyepiece which acts as a simple magnifier.
The magnification of a telescope is
(c) Doug Davis, 2002; all rights reserved
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