System camera

Details System camera System camera

1991-08-05

1992-12-15

Perkey, W. B.

354286, G03B 1336, G03B 720

Patent

active

051721546

ABSTRACT:
A system camera provided with a rear conversion lens barrel interposed between an interchangeable photo-taking lens barrel and a camera body comprises a camera body having a focus detecting apparatus for detecting the amount of deviation of the image plane and a first converting device for correcting the amount of deviation of the image plane detected by the focus detecting apparatus, an interchangeable photo-taking lens barrel disposed forwardly of the camera body and having an interchangeable photo-taking lens and a first memory for storing therein data regarding the exit pupil position PO from the focal plane of the interchangeable photo-taking lens, a rear conversion lens barrel interposed between the interchangeable phototaking lens barrel and the camera body and having a rear conversion lens and a second memory for storing therein data regarding the magnification .beta..sub.R and focal length f.sub.R of the rear conversion lens, and a second converting device for reading the data of the first and second memories and calculating the combined exit pupil position PO' from the focal plane of the combined system of the rear conversion lens and the interchangeable photo-taking lens from the equation that

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