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Canon EF 28-135mm f 3.5-5.6 IS USM

Optical Characteristics

With a 35mm equivalent focal length range of 45-216mm, this lens offers a Wide to Full 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.

Events and Weddings

Events and weddings require capturing fleeting moments and fast ultrasonic motor focusing is necessary to avoid missing those. Avoiding changing lenses is preferable with just 1 or two used between 28 and 300mm. These usually involve shooting at night or in low light indoors where image stabilization is necessary to get sharp results at slower shutter speeds.

Wildlife Scenic photography

Wider, more scenic wildlife shots need anything from 70-300mm in focal length depending on how close you are the particular scene. Singling out individual animals usually requires more powerful telephoto. In telephoto, camera-shake is more problematic and stabilization is very important. Fast ultrasonic focusing is important in capturing fleeting moments.

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.

Full-Time Manual Focus

Many EF lenses are equipped with a ring-type USM which allows full-time manual focus in AF mode. This means you can manually fine-tune focusing as soon as auto focus is complete, without having to switch to manual focusing mode. Full-time manual focusing on most compatible lenses uses a mechanical system for instant responsiveness.

Full-time manual focus is also possible on some lenses equipped with a Micro USM, such as the EF 50mm f/1.4 USM.

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.

Image Stabilizer (IS)

Canon's Image Stabilizer (IS) technology uses a lens shift-type system to detect and correct slight camera shakes. Minute gyro sensors detect lens vibrations caused by hand shake and send a signal to a microcomputer, which controls an IS lens group that compensates movement along the horizontal and vertical axis of the camera. EF lenses with IS technology enable steady shooting at up to four stops lower than is possible with conventional lenses, making them ideal for situations where the use of flash is not permitted or desired.

Specifications

35mm equivalent focal length range: 45-216mm
Lens perspective: Wide to Full Telephoto
Minimum aperture: f22-f36
Image stabilisation: Lens Stabilisation
Ultrasonic motor: Yes
Special lens elements: 16 Elements in 12 Groups
Filter size: 72mm
Weight: 540g
Dimensions: 78.4 x 96.8mm
Maximum magnification: 0.19
Recommended applications: General use, Portraits, Events and Weddings, Wildlife Scenic Photography

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