Canon EF 135mm f/2L USM Lens for Canon SLR Cameras

The fastest 135mm telephoto lens in its class, the Canon EF 135mm f/2L lens is ideal for indoor sports photography and portraits with background blur. Although the lens offers complete automatic focusing capabilities thanks to its Ultra Sonic Motor (USM), you can still take advantage of its manual focus function even when the camera is in AF mode. The lens also offers two UD glass elements that help minimize chromatic aberrations, giving your images outstanding sharpness and color. Other details include a 3-foot close focusing distance, an 18-degree diagonal angle of view, and a 72mm filter size. The lens--which is compatible with EF 1.4x II and 2x II extenders--carries a one-year warranty.

Technical Details :
* EF mount; telephoto lens.
* Ultra-low Dispersion glass with Fluorite elements; inner focusing ring.
* 135mm focal length f/2 maximum aperture Ring USM motor.
* Comes with Leather bag & lens hood.



Specifications :
* Focal length: 135mm
* Maximum aperture: f/2.0
* Lens construction: 10 elements in 8 groups
* Angle of view: 18 degrees
* Closest focusing distance: 3 feet
* Focus adjustment: Rear focusing system with USM
* Mount: Canon
* Filter size: 72mm
* Dimensions: 3.2 inches in diameter and 4.4 inches long
* Weight: 1.7 pounds
* Warranty: 1 year

Pros:
- Very sharp at f2 and super sharp start from f2.5.
- Very fast lens with f/2
- Very good bokeh (background blurring).
- Overall extremely good picture quality with good contrast/color.
- Smaller size, less weight and black color compare to those white 70-200s.
- It is a L lens: best build quality, fast/quiet ring USM AF with FTM.
Cons:
- No hard case.
- No inexpensive.
- Effective focal length is 216mm on 10D/20D/Rebel/300D which is a little difficult to use for portrait.