Canon FD 35mm f/2

The Canon FD 35mm f/2.0 lens was manufactured by Canon for the FD lens mount. It was sold in a number of variations over the years, and was the fastest Canon lens in the 35mm focal length before the debut of the EF 35mm f1.4.

Breech-Lock Mount (FD)

  • Black Bayonet Mount, Concave Front Element, Min Aperture f/16[1]
  • Black Bayonet Mount, Concave Front Element, SSC Coating, Min Aperture f/16[2]
  • Chrome Bayonet Mount, Concave Front Element, SSC Coating, Min Aperture f/16[3]
  • Chrome Bayonet Mount, Convex Front Element, SSC Coating, Min Aperture f/22

Bayonet Mount (nFD)

With a 10-element, 8-group construction, the new FD 35mm f/2 was approximately 25 percent shorter and 29 percent lighter than the earlier FD design.

  • Black, Convex Front Element, Standard New FD Coating, Min Aperture f/22[4]

Thorium

The f/16 versions of the lens had some optical elements which contained the radioactive element Thorium creating concern that these radioactive elements may not be safe.[5] The Thorium lenses were considered sharper side-to-side and at all apertures than any subsequent version. This seems to be as due to a superior optical design enabled by the inclusion of Thorium dioxide glass with enhanced refractive indices. The thoriated glass elements in this lens over time develop a yellow tint reducing transmission and interfering with neutral color reproduction.

References

  1. ↑ "FD35mm f/2 (III)". Canon Camera Museum. Retrieved 2016-10-26.
  2. ↑ "FD35mm f/2 S.S.C. (II)". Canon Camera Museum. Retrieved 2016-10-26.
  3. ↑ "FD35mm f/2 (I)". Canon Camera Museum. Retrieved 2016-10-26.
  4. ↑ "New FD35mm f/2". Canon Camera Museum. Retrieved 2016-10-26.
  5. ↑ http://www.mir.com.my/rb/photography/companies/canon/fdresources/fdlenses/35mm.htm
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