FL bayonet

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The Canon FL bayonet is a lens connection for Canon 35mm SLR cameras . It is the successor to the Canon R bayonet and, in contrast to this, has a transmission element that enables the spring diaphragm .

FL bayonet

Canon FX with FL lens

Period

The FL bayonet appeared in May 1964 and was replaced by the FD bayonet, which appeared in 1971 . Some lenses remained in the range for a while. The FL 1200 mm f / 11 didn't even appear until June 1972 and remained in the range until the late 1970s.

construction

The FL bayonet is compatible with the R bayonet, but has a lever for stopping down the lens, which is located below the mirror when the lens is attached. Despite the aperture value already set, the aperture initially remains open for a bright viewfinder image. The lever is only dimmed when it is triggered. For the TTL exposure metering , stopping down is also required, which happens when the exposure lever is operated.

The Aperture Priority can be turned off to FL lenses to the R-mount cameras, to uncoupled extension tubes , bellows or reverse position to operate. To do this, the spring diaphragm lever on the lens must be pressed by hand until it clicks into place, or on some lenses a specially designed lever must be turned.

Comparison with Super-Canomatic

With the Super Canomatic, which is used on lenses for the R bayonet, you can only stop down once per exposure. Then the system must first be reopened with the film transport. It is therefore unsuitable for TTL exposure metering, because here it is first faded out for exposure metering and then again for the exposure.

Cameras

Canon offered the following cameras for the FL system, all with tracking exposure metering, the FX with CdS photocell on the housing cover, the other cameras with TTL metering:

distribution

The FL bayonet became obsolete very quickly, since starting with the Topcon RE, which also appeared in 1964, more and more cameras with open aperture measurement came out. In particular , Canon was unable to counter the successful Minolta SR-T 101 . The FL bayonet was only used moderately. Only the following FD system was more successful.

FL lenses

Canon FL 58mm f / 1.2
Canon FL 100mm f / 3.5
Canon FL 200mm f / 4.5

Special lenses

FL 19mm f / 3.5

The rear lens of the Canon FL 19 mm f / 3.5 is very close to the film plane and thus protrudes far into the mirror box. It can only be used on cameras with a mirror lock when the mirror is up. The lens has a viewfinder that is attached to the hot shoe. In contrast, the R in the name of the FL 19mm f / 3.5 R indicates that it is a retrofocus construction (the distance between the rear lens and the image plane is greater than the focal length). This lens can be attached as usual.

FLP 38mm f / 2.8

The rear lens of the FLP 38 mm f / 2.8 protrudes further into the mirror box than usual. This is why it can only be attached to the Canon Pellix , the mirror of which requires less space because it is fixed and therefore does not have to keep the circular path free that the movable mirror describes when it is folded up.

Fluorite lenses

With the FL lenses, Canon also began to design high-performance telephoto lenses. The FL-F 300 mm f / 5.6 and FL-F 500 mm f / 5.6 were the first designs of this type to come out in the spring of 1969. They have a lens made of fluorite (from an artificially grown fluorspar crystal). At the beginning of 1974 the FL 300 mm f / 2.8 SSC Fluorite followed.

Macro lenses

The lenses FLM 50 mm f / 3.5 and FLM 100 mm f / 4 are corrected as close-up lenses for close range and have a particularly long worm gear with which they can be focused from infinity to a scale of 1: 2. With an intermediate ring of 25 or 50 mm you can achieve a scale of 1: 1.

List of all lenses

Fixed focal length

  • FL 19mm f / 3.5
  • FL 19 mm f / 3.5 R
  • FL 28mm f / 3.5
  • FL 35mm f / 2.5
  • FL 35 mm f / 3.5 ( Compact Series )
  • FLP 38mm f / 2.8
  • FLM 50mm f / 3.5
  • FL 50mm f / 1.8 (two versions)
  • FL 50mm f / 1.4 (three versions)
  • FL 55mm f / 1.2
  • FL 58mm f / 1.2 (two versions)
  • FL 85mm f / 1.8
  • FL 100mm f / 3.5
  • FLM 100mm f / 4
  • FL 135mm f / 2.5
  • FL 135 mm f / 3.5 ( Compact Series )
  • FL 200mm f / 3.5 (two versions)
  • FL 200 mm f / 4.5 ( Compact Series )
  • FL-F 300mm f / 5.6
  • FL 300 mm f / 4
  • FL 300mm f / 2.8 SSC Fluorite
  • FL 400mm f / 5.6
  • FL-F 500mm f / 5.6
  • FL 600mm f / 5.6
  • FL 800 mm f / 8
  • FL 1200 mm f / 11

Zoom lenses

  • FL 55 - 135mm f / 3.5
  • FL 85 - 300 mm f / 5
  • FL 100 - 200 mm f / 5.6 ( Compact Series )

swell

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