Indice de 3
How do you disassemble and clean this lens?
Background and Identification
The Canon EF 17-35mm f/2.8 L is a lightweight full-frame f/2.8 professional ultrawide zoom lens for all Canon EOS digital and 35mm autofocus cameras. Canon Inc. is a Japanese corporation specializing in optical, imaging, and industrial products such as lenses, cameras, medical equipment, scanners, printers, and semiconductor manufacturing equipment. The Canon EF 17-35mm f/2.8 lens was replaced by the Canon EF 16-35mm lens.
The Canon EF 17-35mm f/2.8 lens was introduced in April 1996 and is called the Canon Zoom Lens EF 17-35mm f/2.8 L Ultrasonic lens by Canon. The EF means “electronic focus,” meaning that there is an autofocus motor in the lens itself. All Canon lenses since 1987 have been EF. The L in the name means “expensive as L.” Ultrasonic means USM, which means you may grab the focus ring at any time for instant, silent manual focus override.
The Canon EF 17-35mm f/2.8 lens has instant manual focus override simply by grabbing its focus ring. The lens is optimized for a 35mm film and full-frame digital and works on all 1.3x and 1.6x Canon cameras. The lens can be used with every Canon DSLR and every Canon autofocus 35mm camera made since 1987. The Canon EF 17-35mm f/2.8 lens is a full-frame lens that works on all Canon SLR (single-lens reflex) cameras.
Focal Length: 17-35mm
Angle of View:
- 104º ~ 63º diagonal
- 70.5º ~ 38º vertical
- 93º ~ 54º horizontal
- 1.4 feet (0.42m) from the image plane, specified.
Maximum Reproduction Ratio:
- 1:9.1 (0.11x)
- 7 blades, somewhat curved
- Stops down to f/22
- Canon specifies 3.3" (83.5mm) diameter by 3.77" (95.7mm) long
- 18.840 oz. (534.1g), measured
- Canon specifies 19.2 oz. (545g)
- Plastic bayonet EW-83C II, included
- LP1216 sack included