|FD||The lens is designed for Canon 35 mm film SLR cameras and is not compatible with Canon EOS digital SLR cameras due to shorter flange focal distance of Canon FD mount.|
|S.S.C.||The Super Spectra Coating is applied to the surface of lens elements. It boosts light transmission, ensures sharp and high contrast images, minimizes ghosting and flares.|
|Position in the lineup|
|Canon EF 20mm F/2.8 USM||Jun 1992||⊗|
|Canon FDn 20mm F/2.8||Dec 1979||⊗|
|Canon FD 20mm F/2.8 S.S.C.||Mar 1973||⊗|
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|Maximum format:||35mm full frame|
|Diagonal angle of view:||94.5° (35mm full frame)|
|Lens construction:||10 elements in 9 groups|
|Number of blades:||6|
|Closest focusing distance:||25 cm|
|Maximum diameter x Length:||Ø75 x 58 mm|
|Filter size:||72 mm|
Design and Features
This is a lens that has taken operability and performance to the next level in response to strong demands from users, such as a mechanism for locking the position of the mount tightening ring, a mechanism for locking the EE mark position of the diaphragm ring, reduced weight, black processing of the front ring, and expanded range and active adoption of multilayer coating.
Despite its short focal length of only 20mm, it is a typical wide angle lens with a brightness of f/2.8 which is the highest available anywhere at the time. This lens is of the retrofocus type and has been developed in compliance with the basic conception of the FD lenses that they must be able to render a sharp image from minimum subject distance to infinity. The floating mechanism has been used for focus control and the design of the lens as a whole is very compact.
It has the normal delineation power of the wide angle lenses in general and its distortion is satisfactorily compensated, but, on the other hand, due to its large aperture, when its angle of view of 94 degrees is used effectively, it shows its forcefulness in wide angle photography whether it be indoors or shooting buildings. It can also be applied successfully to photography in which perspective is emphasized.
Alternatives (MF, 17..23 mm)
|Canon FDn 20mm F/2.8||1979||⊗|