Canon FD 135 mm lens explained

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.^[1]
• 135 mm 2.5 S.C.: The marking for Spectra Coating (SC) was added in 1973.^[2]
• 135 mm 3.5:^[3]
• 135 mm 3.5 S.C. (I):^[4]
• 135 mm 3.5 S.C. (II):^[5]

New FD lenses

• 135 mm 2.0
• 135 mm 2.8
• 135 mm 3.5

Specifications

	FD					New FD
Attribute	2.5	2.5 S.C.	3.5	3.5 S.C. (I)	3.5 S.C. (II)	2	2.8	3.5
Coating	S.C.(unmarked)	S.C.	S.C.(unmarked)	S.C.	S.C.	S.S.C.	S.S.C.	S.S.C.
Maximum aperture	2.5	2.5	3.5	3.5	3.5	2	2.8	3.5
Minimum aperture	22	22	22	22	22	32	32	32
Weight	670 g	630 g	480 g	465 g	385 g	670 g	395 g	325 g
Length	91 mm	91 mm	83 mm	83 mm	85 mm	90.4 mm	78 mm	85 mm
Maximum diameter	69 mm	69 mm	66 mm	66 mm	66 mm	78 mm	63 mm	63 mm
Filter diameter	58 mm	58 mm	55 mm	55 mm	55 mm	72 mm	52 mm	52 mm
Groups/Elements	5/6	5/6	3/4	3/4	4/4	5/6	5/6	4/4
of diaphragm blades	8	8	8	8	6	8	8	6
Closest focusing distance	1.5 m	1.5 m	1.5 m	1.5 m	1.5 m	1.3 m	1.3 m	1.3 m
Release date	March 1971	March 1973	July 1970	March 1973	November 1976	May 1980	June 1979	June 1979

References

1. Web site: FD135mm f/2.5 . . Canon Camera Museum.
2. Web site: FD135mm f/2.5 S.C. . . Canon Camera Museum.
3. Web site: FD135mm f/3.5 . . Canon Camera Museum.
4. Web site: FD135mm f/3.5 S.C. (I) . . Canon Camera Museum.
5. Web site: FD135mm f/3.5 S.C. (II) . . Canon Camera Museum.