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Many of the lenses released for the Canon R mount have an automatic or semi-automatic diaphragm. These are distinguished by the name of the lens: "Super-Canomatic R" lenses are equipped with an automatic diaphragm, while "Canomatic R" lenses have a semi-automatic diaphragm, and a "Canon Lens R" has either a manual preset or manual diaphgram.
Nine-blade iris Pentacon 2.8/135 lens with 15-blade iris Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades In the human eye, the iris (light brown) acts as the diaphragm and continuously constricts and dilates its aperture (the pupil) A 750nm titanium-sapphire laser beam passing through an iris diaphragm, while opening and closing the iris.
Canon: Electromagnetic diaphragm. A more accurate and faster method of actuating a lens diaphragm. EOS Canon: Electro-Optical System. See Canon EOS. FX Nikon: FX. A designation for full-frame sized image sensors. See FF for general usage. G Minolta Gold. A lens designation suffix applied to top grade Minolta AF and Sony Alpha lenses. Sony HSM Sigma
From 1956 SLR camera manufacturers separately developed automatic aperture control (the Miranda T 'Pressure Automatic Diaphragm', and other solutions on the Exakta Varex IIa and Praktica FX2) allowing viewing at the lens's maximum aperture, stopping the lens down to the working aperture at the moment of exposure, and returning the lens to ...
A couple of later Minolta lenses do have a built-in ultrasonic focus motor (SSM lenses), like other SLR and DSLR systems (i.e. Canon and Nikon), where the AF computer is inside the camera body and there is a digital interface connecting body to an electric motor and the focusing gears built into the lens body.
The semi-auto diaphragm closed the lens diaphragm with shutter release, but it needed to be manually re-cocked open. The Duflex was very ambitious but very unreliable and Gamma's first and last production SLR. [100] 1947 Rectaflex (Italy): first SLR camera equipped with a pentaprism for eye-level viewing.
The Canon New F-1 replaced the F-1n (an upgraded F-1) as Canon's top-of-the-line 35mm single-lens reflex camera in September 1981. Like the earlier models, the New F-1 takes FD-mount lenses. Although no date has ever been confirmed, it is thought that the last New F-1 was made in 1992.
Zenit 122 Zenit-4 with leaf shutter Zenit-16 with vertical travel shutter. The first attempt to make high-end professional camera by KMZ was the Start in 1958. This camera had a full set of shutter speeds (from 1 sec to 1/1000), a lens with an automatic diaphragm in a unique breech-lock mount, and even a knife for cutting-off part of the unexposed film.
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