Canon announces the EF 70-300mm f/4-5.6L IS USM lens to extend its well-known L-series professional lens line up. It is described as a high-performance telephoto zoom lens for both pro and amateur photographers.

The quality performance is ensured by the inclusion of two UD elements (ultra-low dispersion) and a floating lens group into the lens’s optical construction. They help avoid chromatic aberration while the Super Spectra coatings minimizes flare and ghost.

The lens benefits from Canon proprietary Optical Image Stabilizer (IS) technology that prevents from blurring when shooting at shutter speeds 4 stops slower than it would be otherwise possible and thus helps achieve sharp images in unfavorable lighting conditions.

A circular aperture comprised of 8 diaphragm blades delivers a pleasant effect of bokeh, which is a subject-background separation by blurring background areas.

Autofocus is driven by to a ring-type USM AF motor that shows quiet yet fast operation. It provides for precise focusing as well thanks to an independent lens CPU. The lens also provides for a full time manual focus override in AF mode.

The lens’s build quality is worth mentioning. The body is protected from environmental influence while its Fluorine Coating makes it easier to clean the lens.

Canon EF 70-300mm f/4-5.6L IS USM - Specifications:

• Focal Length: 70-300mm
• Diagonal Angle of View (FF): 34º - 8º 15′
• Maximum Aperture: F4-5.6
• Minimum Aperture: F32-45
• Lens Construction: 19 Elements in 14 Groups
• Rounded Aperture: 8 Diaphragm Blades
• Minimum Focus: 1.2m
• Maximum Magnification: 0.21x at 300mm
• Ring-type Ultrasonic AF Motor
• Four-Stop Image Stabilization
• Filter Thread: 67mm
• Supplied Accessories: Front and Rear Caps, ET-73B Hood, LP1424 Lens Case
• Optional WII Tripod Mount
• Weight: 1050 g
• Diameter x Length: 89 mm x 143 mm
• Lens Mount: Canon EF

Related Posts:

Sigma APO 300mm ƒ/2.8 EX DG HSM Telephoto Lens
Canon EF 100-400mm f/4.5-5.6 L IS USM Lens
Canon EF 300mm f/2.8L IS USM Lens

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This entry was posted on Sunday, August 29th, 2010 at 9:50 am and is filed under Canon Lenses, Lenses. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.