Canon EF 50mm lens

Front and rear views of a Canon EF50mm f/1.4 USM

The EF 50mm lenses are a group of normal prime lenses made by Canon that share the same focal length. These lenses are based on the classic double-Gauss lens,[1] with the f/1.8 being a standard six-element double-Gauss with an air gap and powers between element 2 and 3[1] and its faster cousins adding additional elements.[2] The 50mm focal length, when used with a 35mm film or full-frame sensor, has been widely considered to match the perspective seen by the human eye.[3]

Canon 50mm lenses have an EF type mount that fits the Canon EOS line of cameras. When pairing a 50mm lens to a Canon DSLR with an APS-C sized sensor, the crop factor effectively turns the 50mm focal length into an 80mm field of view.

Seven EF 50mm lenses have been sold by Canon:

  • f/1.0L USM[4] (discontinued, replaced by f/1.2L USM)
  • f/1.2L USM[5]
  • f/1.4 USM[6]
  • f/1.8[7] (discontinued, replaced by f/1.8 II)
  • f/1.8 II[1] (discontinued, replaced by f/1.8 STM)
  • f/1.8 STM
  • f/2.5 Compact Macro[8]
  1. ^ a b c Canon Inc. "EF50mm f/1.8 II". Canon Camera Museum. Retrieved 2017-05-12.
  2. ^ "EF Lenses". Canon Camera Museum. Canon, Inc. Archived from the original on 2017-05-05. Retrieved 2017-05-12.
  3. ^ 50mm and the Human Eye, Gary Voth. Retrieved 2011-01-10.
  4. ^ Canon Inc. "EF50mm f/1.0L USM". Canon Camera Museum. Retrieved 2017-05-12.
  5. ^ Canon Inc. "EF50mm f/1.2L USM". Canon Camera Museum. Retrieved 2017-05-12.
  6. ^ Canon Inc. "EF50mm f/1.4 USM". Canon Camera Museum. Retrieved 2017-05-12.
  7. ^ Canon Inc. "EF50mm f/1.8". Canon Camera Museum. Retrieved 2017-05-12.
  8. ^ Canon Inc. "EF50mm f/2.5 Compact Macro". Canon Camera Museum. Retrieved 2017-05-12.