Canon EF 70-300mm f/4-5.6 IS USM Lens for Canon EOS SLR Cameras

Featuring the latest 3-stop Image Stabilizer for outstanding camera shake reduction, the EF 70-300mm f4-5.6 IS USM zoom lens also features super responsive autofocus. Replacing the popular EF 75-300mm f4-5.6 IS USM, the world's first interchangeable lens with Image Stabilizer (IS), the lens is expected to appeal to serious amateur nature and sports photographers looking to achieve outstanding results while shooting hand held.

Technical Details :
* 70-300mm telephoto zoom lens with f/4-5.6 maximum aperture for Canon EOS SLR cameras.
* 3-stop Image Stabilizer for reducing camera shake; ring-type ultra-sonic monitor(USM).
* Electro-magnetic diaphragm (EMD) helps create attractive background at large apertures.
* Super Spectra lens coating and lens element shaping suppresses flare and ghosting.
* Measures 3 inches in diameter and 5.6 inches long; weighs 22.2 ounces; 1-year warranty.



- Image Stabilizer : IS dramatically reduces image blur caused by camera shake. The EF 70-300mm f4-5.6 IS USM features Canon's latest 3-stop IS, a one-stop improvement over its predecessor.
- Superb autofocus : The micro USM motor found in the EF 70-300mm f4-5.6 IS USM employs ultra-sonic frequency vibrations to drive auto focus with unrivalled speed and near-silent operation.
- Pleasing defocused background : The EF 70-300mm f4-5.6 IS USM employs an electro-magnetic diaphragm (EMD) with a circular aperture. This helps create an attractive, even defocused background when isolating a subject at large apertures.
- Image quality : By optimizing Super Spectra lens coatings and lens element shaping, Canon's engineers have been effective in suppressing flare and ghosting--more prone to occur with digital cameras due to reflection off the image sensor.
- The EOS system : The EF 70-300mm f4-5.6 IS USM includes distance metering information, providing compatibility with the E-TTL II flash system of late model cameras such as the EOS-1D Mark II N and EOS 5D .

Pros:
The optical quality is great, the speed is terrific, and it compares well to the 70-200mm lens that people like to say blows this out of the water (I believe they are wrong - but we will get into that later) and finally, the price cannot be beaten. Buy it.

Cons:
No hood, extends as it zooms, and the quality of the picture in low light situation lessens a little.