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Digital wireless camera. Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio.
The R mount is the standard method of connecting a lens to the Leica R series of 35 mm single-lens reflex cameras. The mount is descended from those used for the Leicaflex, Leicaflex SL and Leicaflex SL2 SLR cameras, but differs in the cams used to communicate lens aperture information to the camera. 3 cam lenses are compatible with all of the ...
3 yes yes CF+SD: 156x157x80 1180 Oct 2009: Canon: 5D Mark III: Full frame: 22.3 EF: 100 63 61 50 102400 6 3.2 yes yes CF+SD: 152x117x77 950 (860 without battery) Mar 2012: Archived 2015-11-03 at the Wayback Machine: Canon: 5D Mark II: Full frame: 21.1 EF: 98 35 9 50 25600 3.9 3 yes yes CF: 152x114x75 810 Sep 2008: Canon: 6D: Full frame: 20.2 EF ...
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Announced in October, 2006 at photokina, the Bessa R4M and Bessa R4A were the first Leica M-mount cameras to include framelines wider than 28 mm. [citation needed] The R4-series keeps the same features as the R3-series, but utilizes a wide-angle-specific viewfinder with .52x magnification and framelines for 21, 25, 28, 35, and 50 mm lenses.
The B4 mount defines the sensor to have a diagonal size of 11 mm (a so-called 2/3" size sensor). The B4-mount is used by practically all 2/3" broadcast lenses and cameras (as of 2019). Although the standard was set in 1992, the B4 mount already existed before 1980. The Sony BVP-300, produced from 1978, was possibly the first camera with a B4 mount.