# Canon FL lens mount

Canon FL refers to a lens mount standard for 35mm single-lens reflex cameras from Canon. It was introduced in April 1964 with the Canon FX camera, replacing the previous Canon R lens mount. The FL mount was in turn replaced in 1971 by the Canon FD lens mount. FL lenses can also be used on FD-mount cameras.
Many mirrorless interchangeable-lens cameras are able to use Canon FL lenses via an adapter.

## FL cameras

* Canon FX (1964)
* Canon FP (1964)
* Canon Pellix (1965)
* Canon FT QL (1966)
* Canon Pellix QL (1966)
* Canon TL (1968)

## FL lenses

* Differences in aperture coupling mechanisms for Canon FL (28mm lens, left) and R mount (50mm lens, right)
* FL 58mm f/1.2
* FL 200mm f/4.5
Canon FL lenses :
| Focal length (mm) | Name | Aperture | Year | Construc. (Ele/Grp) | Min. focus (Mag.) | Filter (mm) | Dia. × Len. | Wgt. |
| Wide angle lenses ||||||||||
| 19 | FL 19mm f/3.5 | f/3.5–16 | Aug 1964 | 9/7 | 0.5 m (1.6 ft) (0.044×) | 58 | 65×18 mm (2.6×0.7 in) | 150 g (5.3 oz) |
| 19 | FL 19mm f/3.5R | f/3.5–16 | Nov 1965 | 11/9 | 0.5 m (1.6 ft) (0.048×) | Ser. IX | 82×68 mm (3.2×2.7 in) | 500 g (18 oz) |
| 28 | FL 28mm f/3.5 | f/3.5–16 | Dec 1966 | 7/7 | 0.4 m (1.3 ft) (0.09×) | 58 | 65×40 mm (2.6×1.6 in) | 240 g (8.5 oz) |
| 35 | FL 35mm f/2.5 | f/2.5–16 | Mar 1964 | 7/5 | 0.4 m (1.3 ft) (0.115×) | 58 | 63×55 mm (2.5×2.2 in) | 352 g (12.4 oz) |
| 35 | FL 35mm f/3.5 | f/3.5–16 | May 1968 | 6/6 | 0.4 m (1.3 ft) (0.106×) | 48 | 62×43 mm (2.4×1.7 in) | 270 g (9.5 oz) |
| 38 | FLP 38mm f/2.8 | f/2.8–16 | May 1965 | 4/3 | 0.8 m (2.6 ft) (0.054×) | 48 | 66×21 mm (2.6×0.8 in) | 210 g (7.4 oz) |
| Normal lenses ||||||||||
| 50 | FL 50mm f/1.4 | f/1.4–16 | Apr 1965 | 6/4 | 0.6 m (2.0 ft) (0.103×) | 58 | 65×43 mm (2.6×1.7 in) | 280 g (9.9 oz) |
| 50 | FL 50mm f/1.4 I | f/1.4–16 | Sep 1966 | 6/5 | 0.6 m (2.0 ft) (0.103×) | 58 | 64×43 mm (2.5×1.7 in) | ? |
| 50 | FL 50mm f/1.4 II | f/1.4–16 | May 1968 | 7/6 | 0.6 m (2.0 ft) (0.101×) | 58 | 65×51 mm (2.6×2.0 in) | 340 g (12 oz) |
| 50 | FL 50mm f/1.8 I | f/1.8–16 | Mar 1964 | 6/4 | 0.6 m (2.0 ft) (0.104×) | 48 | 61×40 mm (2.4×1.6 in) | 228 g (8.0 oz) |
| 50 | FL 50mm f/1.8 II | f/1.8–16 | Mar 1968 | 6/4 | 0.6 m (2.0 ft) (0.103×) | 48 | 62×42.5 mm (2.4×1.7 in) | 280 g (9.9 oz) |
| 50 | FL 50mm f/3.5 Macro | f/3.5–16 | Jun 1965 | 4/3 | 0.234 m (0.8 ft) (0.5×) | 58 | 64×56 mm (2.5×2.2 in) | 295 g (10.4 oz) |
| 55 | FL 55mm f/1.2 | f/1.2–16 | Jul 1968 | 8/7 | 0.6 m (2.0 ft) (0.109×) | 58 | 67×52.5 mm (2.6×2.1 in) | 480 g (17 oz) |
| 58 | FL 58mm f/1.2 I | f/1.2–16 | Mar 1964 | 7/5 | 0.6 m (2.0 ft) (0.117×) | 58 | 64.5×52.5 mm (2.5×2.1 in) | 410 g (14 oz) |
| 58 | FL 58mm f/1.2 II | f/1.2–16 | Mar 1966 | 7/5 | 0.6 m (2.0 ft) (0.117×) | 58 | 64.5×52.5 mm (2.5×2.1 in) | 410 g (14 oz) |
| Telephoto lenses ||||||||||
| 85 | FL 85mm f/1.8 | f/1.8–16 | Sep 1964 | 5/4 | 1 m (3.3 ft) (0.101×) | 58 | 64×55 mm (2.5×2.2 in) | 445 g (15.7 oz) |
| 100 | FL 100mm f/3.5 | f/3.5–22 | Oct 1964 | 5/4 | 1 m (3.3 ft) (0.101×) | 48 | 63×61 mm (2.5×2.4 in) | 278 g (9.8 oz) |
| 100 | FL M 100mm f/4 | f/4–22 | Sep 1969 | 5/3 | — | 48 | 61×43 mm (2.4×1.7 in) | 220 g (7.8 oz) |
| 135 | FL 135mm f/2.5 | f/2.5–22 | May 1965 | 6/4 | 1.5 m (4.9 ft) (0.106×) | 58 | 68×102 mm (2.7×4.0 in) | 645 g (22.8 oz) |
| 135 | FL 135mm f/3.5 | f/3.5–22 | May 1965 | 4/3 | 1.5 m (4.9 ft) (0.094×) | 48 | 62×83 mm (2.4×3.3 in) | 434 g (15.3 oz) |
| 200 | FL 200mm f/3.5 I | f/3.5–22 | Mar 1964 | 7/5 | 2.5 m (8.2 ft) (0.095×) | 58 | 68×152.5 mm (2.7×6.0 in) | 660 g (23 oz) |
| 200 | FL 200mm f/3.5 II | f/3.5–22 | May 1966 | 7/5 | 2.5 m (8.2 ft) (0.095×) | 58 | 68×152.5 mm (2.7×6.0 in) | 680 g (24 oz) |
| 200 | FL 200mm f/4.5 | f/4.5–22 | Sep 1966 | 5/4 | 2.5 m (8.2 ft) (0.094×) | 48 | 63×146 mm (2.5×5.7 in) | 555 g (19.6 oz) |
| 300 | FL 300mm f/2.8 S.S.C. Fluorite | f/2.8–32 | Feb 1974 | 6/5 | 3.5 m (11.5 ft) (0.103×) | — | 112×230 mm (4.4×9.1 in) | 2,340 g (83 oz) |
| 300 | FL-F 300mm f/5.6 | f/5.6–22 | May 1969 | 7/6 | 3.5 m (11.5 ft) (0.091×) | 58 | 75×168 mm (3.0×6.6 in) | 850 g (30 oz) |
| 400 | 400mm f/4.5 | f/4.5–32 | Sep 1971 | 5/4 | 4.5 m (14.8 ft) (0.111×) | 48 | 108×338 mm (4.3×13.3 in) | 3,890 g (137 oz) |
| 500 | FL-F 500mm f/5.6 | f/5.6–22 | Jun 1969 | 6/5 | 10 m (32.8 ft) (0.059×) | 95 | 106×300 mm (4.2×11.8 in) | 2,700 g (95 oz) |
| 600 | 600mm f/5.6 | f/5.6–32 | Sep 1971 | 6/5 | 10 m (32.8 ft) (0.07×) | 48 | 128×448 mm (5.0×17.6 in) | 5,000 g (180 oz) |
| 800 | 800mm f/8 | f/8–32 | Sep 1971 | 7/5 | 18 m (59.1 ft) (0.051×) | 48 | 128×508 mm (5.0×20.0 in) | 5,360 g (189 oz) |
| 1200 | 1200mm f/11 | f/11–64 | Jun 1972 | 7/5 | 40 m (131.2 ft) (0.032×) | 48 | 128×853 mm (5.0×33.6 in) | 6,200 g (220 oz) |
| Zoom lenses ||||||||||
| 55–135 | FL 55-135mm f/3.5 | f/3.5–22 | Mar 1964 | 13/10 | 2 m (6.6 ft) (0.08×) | 58 | 69×140 mm (2.7×5.5 in) | 780 g (28 oz) |
| 85–300 | FL 85-300mm f/5 | f/5–22 | Apr 1965 | 15/9 | 4 m (13.1 ft) (0.085×) | 72 | 93×279 mm (3.7×11.0 in) | 1,850 g (65 oz) |
| 100–200 | FL 100-200mm f/5.6 | f/5.6–22 | Dec 1966 | 8/5 | 2.5 m (8.2 ft) (0.092×) | 55 | 64×173 mm (2.5×6.8 in) | 650 g (23 oz) |
| Teleconverters ||||||||||
| 2× | Extender 2× | 2× | Feb 1974 | 5/5 | — | — | 64×37 mm (2.5×1.5 in) | 180 g (6.3 oz) |
The list is complete.

### Notes

* ↑ The FL 19mm F3.5 (not the 19mm F3.5 R) was a true wide angle (short focus) lens, similar in construction to the Zeiss Biogon. Its rear projected far into the mirror box on an SLR, and because of this, it could only be used on a camera with mirror lock-up (FP, FX, FT, F-1 (old), FTb, EF). It could not be used on either Pellix model.
* ↑ The FL P 38mm F2.8 also projected into the mirror box. It was specially designed for the Pellix and could not be used on any other camera because the moving mirror would hit the rear of the lens. This lens had a longer lens mount index (the pin on the back or the lens at the top), that only fit the deeper cutout at the top of the Pellix's lens mount, thus making it impossible to mount this lens on any other camera.
* ↑ Canon released 3 'levels' of standard lenses (exc. macro). The f/1.8 lenses were small and lightweight, f/1.4 were mid-range, and the f/1.2 were professional level (top of their line).
* ↑ The FL M 100mm F4 iss a special purpose bellows lens. It could only be used when mounted on a bellows, such as the Bellows FL, because it lacked a focusing ring.
* 1 2 3 Incorporates fluorite element(s) ground from artificial crystal
* 1 2 3 4 Two-part telephoto system, consisting of a front unit with the front group, which mounts onto a focusing unit with the rear optical group, automatic diaphragm control mechanism, and focusing rack-and-pinion.