refers to three telephoto zoom lenses produced past Canon. They are of the EF lens mount that is uniform with the EOS line of cameras.
The iii versions are:
- f/iv.5–5.6 USM
The 2 v.vi versions were contemporaries, launched at the start 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-50 version in the early on 1990s to the iv.5-5.6 version, non the L. It had improved styling, a ring zoom command instead of push-pull, and a larger (faster) aperture at the wider end. It also fabricated use of a much faster and much quieter Ultrasonic (“USM”) motor for autofocus command, instead of the Arc-Form Bulldoze (“AFD”) found on the 5.half dozen lenses. The L version never received this upgrade, and information technology lasted long afterwards the v.6 non-Fifty had been discontinued. Following Canon practice, the L lens was sold including its lens hood and protective case.
|Ultra-depression dispersion glass element||No||Yes||No|
|Synthetic Fluorite glass chemical element||No||Yes||No|
|Brusk back focus||No|
|Weight||685 one thousand||695 g||540 g|
|Max. Diameter x Length||75 mm ten 166.8 mm||75 mm ten 166.6 mm||73 mm ten 121.5 mm|
|Filter diameter||58 mm|
|Horizontal viewing angle||20°–half-dozen°fifty’|
|Vertical viewing angle||14°–4°35′|
|Diagonal viewing angle;||24°–8°15′|
|# of diaphragm blades||8|
|Closest focusing altitude||two one thousand||ane.5 m|
|Currently in production?||No|
|Release engagement||March 1987||June 1987||June 1990|
Canon Inc. “EF100-300mm f/5.6”.
Canon Camera Museum
Canon Inc. “EF100-300mm f/5.6L”.
Catechism Photographic camera Museum
Canon Inc. “EF100-300mm f/4.5-v.6 USM”.
Catechism Camera Museum