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Canon EF 28-105mm f 3.5-4.5 II USM

Optical Characteristics

With a 35mm equivalent focal length range of 45-168mm, this lens offers a Wide to short telephoto 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

General use

A basic kit for non-specific photography should cover between 28-300mm

Portraits

Portraits are best shot with focal lengths between 85 and 300mm depending on whether shooting mid-length or close-ups and the amount spacial compression wanted. Depth of field is the most important tool to manipulate and a fast lens will give more scope for creative treatment.

Fashion

A focal length of about 50mm is recommended for full to mid length portraits, 85mm and  higher for medium closeup to closeups depending on the amount of spacial compression wanted. Depth of field is the most important tool to manipulate and a fast lens will give more scope for creative treatment.

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.  Inner and rear systems are faster and less energy consuming but also have the advantage of not moving the front lens group so that filters on the front remain in their position.

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: 45-168mm
Lens perspective: Wide to short telephoto
Minimum aperture: f22-f32
Image stabilisation: None
Ultrasonic motor: Yes
Special lens elements: None
Filter size: 58mm
Weight: 210g
Dimensions: 67 x 68
Maximum magnification: 0.19
Recommended applications: General use, Portraits, Fashion

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