Abstract
Telescopes which allow a change of magnification of 3 to 1 linear or 10 to 1 in area are well known. A new telescopic system with variable magnification will be demonstrated which has a range of angular magnification of 10 to 1 or a variation of area covered of 100 to 1. The apparent angle of field is 53°. During the changes in magnification the focal deviation is negligibly small and well within the accommodation range of the human eye.
© 1953 Optical Society of America
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