Canon EF 70-200mm f/4 L IS USM Lens for Canon Digital SLR Cameras

Capture the far-off action of fast-paced sports or zoom in for an intimate portrait with the Canon EF 70-200mm telephoto zoom lens. The L-series lens offers an Image Stabilizer that provides up to four stops of shake correction--a first for Canon IS lenses. The use of fluorite UD lens elements, meanwhile, produces an excellent optical performance in terms of resolution and contrast. Add in a sturdy housing with water- and dust-proof construction and you have a lens that's both portable and high performing. Other details include an f/4 maximum aperture, a ring-type ultra-sonic monitor (USM) that enables quick and quiet autofocusing, compatibility with circular polarizing filters, and a lightweight body. The lens carries a one-year warranty.

Technical Details :
* 70-200mm telephoto zoom lens with f/4 maximum aperture for Canon digital SLR cameras.
* Fluorite UD lens elements produce excellent optical performance in resolution and contrast.
* Ring-type ultra-sonic monitor (USM) for quick and quiet autofocusing; lightweight construction.
* Image Stabilizer provides up to 4 stops of shake correction; water- and dust-proof construction.
* Measures 3 inches in diameter and 6.8 inches long; weighs 26.8 ounces;1-year warranty.



FEATURES :
* Focal length: 70-200mm
* Maximum aperture: f/4
* Lens construction: 20 elements in 15 groups
* Diagonal angle of view: 34 to 12 degrees (with full-frame cameras)
* Focus adjustment: AF with full-time manual focus
* Closest focusing distance: 3.94 feet
* Zoom system: 7-group helical zoom (72-degree rotational angle)
* Filter size: 67mm
* Dimensions: 3 inches in diameter, 6.8 inches long
* Weight: 26.8 ounces

Pros:
- 4-stop image stabilizer.
- Not too heavy. Not too large.
- Amazing build quality.
- Great image quality with very nice bokeh.
- Top-notch focus mechanism.

Cons:
- Expensive.
- Image Stabilization will use more battery.
- f/4 aperture may not be fast enough for some.