Patent
1989-09-05
1990-11-27
Hix, L. T.
354295, G03B 1748
Patent
active
049739956
ABSTRACT:
An attachment lens and a camera system, comprising an attachment lens adapted to be attached to the subject side of a camera which is equipped with separate optical openings for the photography system, the finder system, the photometry system, and the colorimetry system. The attachment lens includes an optical element which is on the camera side and which is equipped with a plurality of integrally formed sections facing the optical openings of the camera and having different refractive power configurations, thereby allowing the optical systems to be arranged close to each other.
REFERENCES:
patent: 2730024 (1956-01-01), Merrick
Kato Masatake
Takeda Shohei
Canon Kabushiki Kaisha
Gray David M.
Hix L. T,.
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