Lens mounts and flange focal distances （透镜支架和法兰焦距）.pdf

This is a page of data on the lens flange distance and image coverage of various stills and movie lens systems. It aims to provide information on the viability of adapting lenses from one system to another. Video/Movie format-lens coverage: [caveat: While you might suppose lenses made for a particular camera or gate/sensor size might be optimised for that system (ie so the circle of cover fits the gate, maximising the effective aperture and sharpness, and minimising light spill and lack of contrast... however it seems to be seldom the case, as lots of other factors contribute to lens design (to the point when sometimes a lens for one system is simply sold as suitable for another (eg large format lenses with M42 mounts for SLRs! and SLR lenses for half frame). Specialist lenses (most movie and specifically professional movie lenses) however do seem to adhere to good design practice, but what is optimal at any point in time has varied with film stocks and aspect ratios! ] 1932: 8mm picture area is 4.8×3.5mm (approx 4.5x3.3mm useable), aspect ratio close to 1.33 and image circle of ø5.94mm. 1965: super8 picture area is 5.79×4.01mm, aspect ratio close to 1.44 and image circle of ø7.043mm. 2011: Ultra Pan8 picture area is 10.52×3.75mm, aspect ratio 2.8 and image circle of ø11.2mm (minimum). 1923: standard 16mm picture area is 10.26×7.49mm, aspect ratio close to 1.37 and image circle of ø12.7mm. Std 16 lens IC is typically ø14mm+. 2005: Ultra-16 format, picture area is 11.66×6.15mm, with same lens centre as standard 16 (the largest 16x9 area that can be shot on a standard 16mm camera). 1971: super16 picture area is 12.52×7.41mm. AR=1.67 (lens is offset compared to std 16mm with respect to the neg), IC= ø14.55mm. The correct specs (ARRI version, machined gate) for Super 16 full aperture gate is 12.35x7.5 mm, IC= ø14.45mm (ref. Jorge Díaz-Amador, R). Obviously this relates to what can be seen in the viewfinder, not what is typically telecine (in or