Rear conversion lens system

Details Rear conversion lens system Rear conversion lens system

1985-06-07

1988-03-01

Corbin, John K.

350422, G02B 960

Patent

active

047281790

ABSTRACT:
A rear conversion lens system to be used for varying the focal length being inserted to the space between an objective for a single-lens reflex camera and film surface, the rear conversion lens system comprising a first lens component arranged as a positive lens, a second lens component arranged as a negative lens, a third lens component arranged as a positive meniscus lens, a fourth lens component arranged as a biconcave lens, and a fifth lens component arranged as a positive cemented doublet, the rear conversion lens system being arranged that the magnification is higher than 1.6 and aberrations are corrected favorably.

REFERENCES:
patent: 4206971 (1980-06-01), Hamanishi et al.

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