Canon EF 100-300mm lens

The EF 100–300mm refers to three telephoto zoom lenses produced by Canon. They are of the EF lens mount that is compatible with the EOS line of cameras.

Canon 100-300 mm

The three versions are:

  • f/5.6
  • f/5.6L
  • f/4.5–5.6 USM

The two 5.6 versions were contemporaries, launched at the beginning of the Canon EOS system. The L version had a different optical construction which improved sharpness, color, and chromatic aberrations. Otherwise the lenses were physically similar. Canon decided to upgrade the non-L version in the early 1990s to the 4.5-5.6 version, not the L. It had improved styling, a ring zoom control instead of push-pull, and a larger (faster) aperture at the wider end. It also made use of a much faster and much quieter Ultrasonic ("USM") motor for autofocus control, instead of the Arc-Form Drive ("AFD") found on the 5.6 lenses. The L version never received this upgrade, and it lasted long after the 5.6 non-L had been discontinued. Following Canon practice, the L lens was sold including its lens hood and protective case.

Lenses
Attribute f/5.6 [1] f/5.6L[2] f/4.5–5.6 USM[3]
Image stabilizer  No
Ring USM  No  Yes
L-series  No  Yes  No
Diffractive Optics  No
Ultra-low dispersion glass element  No  Yes  No
Synthetic Fluorite glass element  No  Yes  No
Macro  Yes
Short back focus  No
Maximum aperture f/5.6 f/4.5–5.6
Minimum aperture f/32 f/40
Weight 685 g 695 g 540 g
Max. Diameter x Length 75 mm x 166.8 mm 75 mm x 166.6 mm 73 mm x 121.5 mm
Filter diameter 58 mm
Horizontal viewing angle 20°–6°50'
Vertical viewing angle 14°–4°35'
Diagonal viewing angle; 24°–8°15'
Groups/elements 9/15 10/15 10/13
# of diaphragm blades 8
Closest focusing distance 2 m 1.5 m
Currently in production?  No
Release date March 1987 June 1987 June 1990
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References
  1. Canon Inc. "EF100-300mm f/5.6". Canon Camera Museum. Retrieved 2016-05-18.
  2. Canon Inc. "EF100-300mm f/5.6L". Canon Camera Museum. Retrieved 2016-05-18.
  3. Canon Inc. "EF100-300mm f/4.5-5.6 USM". Canon Camera Museum. Retrieved 2016-05-18.
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