function correctly on the FM10. Many of the newest Nikon and third-party F-mount lenses, and some older designs, will mount on the FM10, but will not function properly. Nikon’s most recent 35 mm film/full-frame FX digital SLR lenses, the AF Nikkor G type (introduced in 2000) lack an aperture control ring, without which there is no way to set aperture using the FM10. AF Nikkor DX type (2003) lack an aperture ring as well, and have a smaller image circles sized for the smaller sensors on Nikon's DX digital SLRs, thus projecting a black vignette circle onto the FM10 film plane. Nikon's Vibration Reduction (VR) image stabilization system, available on some newer lenses since 2000, does not function on the FM10. Both IX Nikkor lenses (1996), for Nikon's Advanced Photo System (APS) film SLRs and very old "invasive" Nikkor 35 mm fisheye lenses must not be mounted on the FM10, as their rear elements will intrude far enough into the mirror box to cause damage. Flash The Nikon SB-M dedicated flash is designed specifically for the FM10, but it will also accept any other nondedicated hot shoe mounted flash for guide number manual or flash mounted sensor automatic exposure control – the venerable Vivitar 283 (guide number 120, ASA 100/feet; 37, DIN 21/meters) was still available new a quarter century after its introduction in 1975. The FM10 does not accept a motor drive; film is only advanced manually via a thumb lever. Design history Chassis The aluminum alloy chassis used in the FM10 can be traced back more than twenty-five years to the Cosina CT-1. Cosina has a long history of producing equipment to specification for other camera companies. Other famous name SLR cameras that were built around the CT-1 chassis include the Canon T60, Nikon FE10, Olympus OM2000, Ricoh KR-5 Super II and Yashica FX-3. They differ primarily in their outer cosmetic plastic body panels, lens mounts and nameplates. This chassis is also used, in heavily reworked form, as the basis for the recent Rollei 35RF, Zeiss Ikon and Cosina's own Voigtländer branded Bessa R series of 35 mm film rangefinder (RF) cameras as well as the unique Epson R-D1 digital rangefinder camera in magnesium alloy. Target markets and criticism The Nikon FM10 fills the very bottom of the Nikon SLR line, and was introduced to meet the needs of the burgeoning South and East Asian amateur photographic markets.