a flange focal distance of only 20mm and a 2× crop factor, halving the field of view compared to the original 24x36mm film frame. As of 2012, with the introduction of the Canon EOS M mirrorless camera, almost all FD or FL lenses can be successfully adapted with infinity focus available without the need for a compensating lens, thus not compromising resolution, contrast and distortion performance. The EOS-M has an 18 megapixel APS-C sensor, offering image quality and resolution equivalent to other Canon EF-S APS-C sized sensors, retaining their 1.6× crop factor. The FD/FL lens must be manually focused and metering is done with aperture priority. FD lenses can also be mounted to current mirrorless digital cameras with short flange focal distance, using simple mechanical adapters without optical correction. FD lenses, especially wide and ultra-wide f/2.8, f/2 and f/1.4 variants, have proven popular options for videography for these mirrorless formats. Another popular option is the Sony NEX/Sony ILCE system of mirrorless interchangeable lens cameras with Sony E-mount. The E-mount has a flange distance of 18mm and a 1.5× crop factor with APS-C sensor cameras and a 1× crop factor with full frame sensor cameras, f. i. the Sony α7 series introduced in late 2013. List of Canon-made FD-mount camera bodies and lenses FD cameras Canon F-1 (1971) Canon FTb (1971) Canon FTbn (1973) Canon EF (1973) Canon TLb (1974) Canon TX (1975) Canon F-1n (slight revision of 1971 F-1) (1976) Canon AE-1 (1976) Canon AT-1 (1976) Canon A-1 (1978) Canon AV-1 (1979) Canon New F-1 (total redesign of the F-1) (1981) Canon AE-1 Program (1981) Canon AL-1 (1982) Canon T50 (1983) Canon T70 (1984) Canon T80 (1985) Canon T90 (1986) Canon T60 (1990) FD lenses The FD series includes lenses of all standard focal lengths ranging from 7.5mm to 800mm. At least two different maximum apertures were offered at each focal length from 24mm to 500mm. The original generation of FD lenses featured a silver colored locking ring at the base. Only the locking ring turns to lock the lens to the camera body; the lens body remains stationary. The later New FD lenses have a black mount which includes a lens release button. Note that some lenses listed below were marketed in only one generation. Lenses of identical focal lengths and maximum apertures that spanned both generations, in addition to their altered mounts, were typically smaller and lighter in