Several different models of Canon FD 135 mm lenses were produced by Canon Inc. for the Canon FD lens mount. Two were produced in the original "Old FD" style with a silver locking ring for the breech lock mount at the base, while three models were produced as "New FD" lenses where the entire lens barrel rotated to lock the lens in place.
"Old" FD lenses
135 mm 2.5: introduced in 1971 as one of the first lenses in the new Canon FD mount. Like all of the very early Canon FD lenses, it does not indicate the type of coating on the front lens ring. All lenses from 1971 (indeed, from the very early 1950s forward) were coated in one form or another. 135 mm 2.5 S.C.: The marking for Spectra Coating (SC) was added in 1973. 135 mm 3.5: 135 mm 3.5 S.C. (I): 135 mm 3.5 S.C. (II):
New FD lenses 135 mm 2.0 135 mm 2.8 135 mm 3.5
Specifications
FDNew FDAttribute2.52.5 S.C.3.53.5 S.C. (I)3.5 S.C. (II)22.83.5CoatingS.C.(unmarked)S.C.S.C.(unmarked)S.C.S.C.S.S.C.S.S.C.S.S.C.Maximum aperture2.52.53.53.53.522.83.5Minimum aperture2222222222323232Weight670 g630 g480 g465 g385 g670 g395 g325 gLength91 mm91 mm83 mm83 mm85 mm90.4 mm78 mm85 mmMaximum diameter69 mm69 mm66 mm66 mm66 mm78 mm63 mm63 mmFilter diameter58 mm58 mm55 mm55 mm55 mm72 mm52 mm52 mmGroups/Elements5/65/63/43/44/45/65/64/4# of diaphragm blades88886886Closest focusing distance1.5 m1.5 m1.5 m1.5 m1.5 m1.3 m1.3 m1.3 mRelease dateMarch 1971March 1973July 1970March 1973November 1976May 1980June 1979June 1979
References