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Canon made two fast lenses, the FL 50mm 1:1.4 and the FL 58mm 1:1.2, in order to compensate for the light loss. As the shutter curtain is permanently exposed to light without being protected by a moving mirror, a metal, rather than fabric curtain is used, which prevents the possibility of burning by being accidentally pointed at the sun, with ...
The Canon "quick loader" in a Canon FTb. FT QL with Canon FD 135mm f/3.5 lens. The Canon FT QL is a 35mm single-lens reflex camera introduced by Canon Inc. in March 1966. It has a Canon FL lens mount compatible with the large range of FL series lenses. The FT can also operate the later Canon FD series lenses in stop-down mode, but the earlier R ...
Pentamirror. A roof pentamirror contains 3 mirrors. A pentamirror is an optical device used in the viewfinder systems of various single-lens reflex cameras instead of the pentaprism. It is used to reverse again the laterally reversed image coming from the reflex mirror. [1]
Canon EOS R3. The Canon EOS R3 [1] [2] is a 24 megapixel full-frame mirrorless interchangeable-lens camera launched by Canon officially announced by Canon on 14 September 2021 [3] alongside two RF mount lenses. The camera is available as body only with a MSRP of US$5,999.00. The camera marks the return of eye-controlled autofocus, a feature not ...
1.5 — all of 1.4 plus specification corrections and clarifications to absolute volume control, browsing and other features; 1.6 — all of 1.5 plus browsing data and track information. Number of items that are in a folder without downloading the list; Support for transmitting cover arts through the BIP over OBEX protocol.
Canon TLb. Canon TLb. The Canon TLb is a 35 mm single-lens reflex camera introduced by Canon in September 1974. [1] [2] It features a Canon FD lens mount, and is also compatible with Canon's earlier FL-mount lenses in stop-down metering mode. The TLb was a cheaper version of the Canon FTb for the export market, as was the slightly later TX.
The development of astrophotography as a scientific tool was pioneered in the mid-19th century for the most part by experimenters and amateur astronomers, or so-called "gentleman scientists" (although, as in other scientific fields, these were not always men). Because of the very long exposures needed to capture relatively faint astronomical ...
In optics, chromatic aberration ( CA ), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point. [1] It is caused by dispersion: the refractive index of the lens elements varies with the wavelength of light. The refractive index of most transparent materials decreases with increasing ...