Acta Optica Sinica, Volume. 5, Issue 4, 362(1985)
A new-type zoom lens with large aperture
The design features of a large-aperture zoom lens tor 35 mm motion picture camera are presented. A structure of a fixed part between two moving parts in order to correct astigmatism is discussed. A new-type zoom lens is given as an example. It has a range of focal length of 25~85 mm, a relative aperture of 1/1.4 and maximum angular field 67°~18°.
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YOU YINGQI. A new-type zoom lens with large aperture[J]. Acta Optica Sinica, 1985, 5(4): 362