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Canon EF 20mm f 2.8 USM

Optical Characteristics

With a 35mm equivalent focal length range of 32mm, this lens offers a Standard Wide perspective.

Recommended Applications

*Recommendations are based only on the features necessary to perform the application successfully and do not take into account the relative image quality of different lenses

Landscapes

Wide expanses and panoramas can be captured with this focal length. For this application aperture settings will usually vary from f5.6 and smaller and cameras will usually be tripod mounted.

Technologies

Inner and Rear Focusing System

Many photographic lenses use either all-group focusing (all lens groups are moved together along the optical axis) or front-group focusing (only the front lens group is moved). These systems require far more power from the drive mechanism, limiting auto focus speeds. The need for large front lens groups also limits the potential for compact lens sizes.

Ultrasonic Motor (USM)

Canon's Ultrasonic Motor (USM) is a lens-based motor to harness ultrasonic oscillation energy. This technology makes focusing precise, virtually noiseless and incredibly quick – some lenses focusing literally faster than the human eye. The USM starts instantaneously and stops the moment focus is achieved, with no overshooting. What's more, the USM requires minimal battery power so you can shoot for longer on a single charge.

Specifications

35mm equivalent focal length range: 32mm
Lens perspective: Standard Wide
Minimum aperture: f22
Image stabilisation: In-Camera Stabilisation
Ultrasonic motor: Yes
Special lens elements: 11 Elements in 9 Groups
Filter size: 72mm
Weight: 405g
Dimensions: 77.5 x 70.6mm
Maximum magnification: 0.14
Recommended applications: Landscapes

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