Canon EF 50mm f/1.2L USM

The Canon EF 50mm f/1.2L USM lens is a peerless standard lens for Canon digital SLR cameras. The lens is suitable for any shooting situation, with a lens coating and construction type that are optimized to minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras. The lens also offers an ultra-large aperture that produces a narrow depth of field and the type of soft background blur so loved by photographers everywhere. The high-performance, weather-resistant lens delivers all the superb image resolution and contrast you expect in a Canon L Series lens.

Features:
* High-performance, weather-resistant standard lens
* AF with full-time manual focus
* 50mm focal length
* f1.2 maximum aperture; 72mm filter size
* UltraSonic Motor (USM)


Specifications
* Focal length: 50mm
* Maximum aperture: f/1.2
* Lens construction: 8 elements in 6 groups
* Diagonal angle of view: 46 degrees (with full-frame cameras)
* Focus adjustment: AF with full-time manual
* Closest focusing distance: 1.48 feet
* Filter size: 72mm
* Dimensions: 3.4 inches in diameter and 2.6 inches long
* Weight: 19.2 ounces
* Warranty: 1 year

The Digital Picture.com Says:

Being a prime Canon L Series Lens, the Canon 50 f/1.2 far exceeds all existing Canon 50mm lenses in nearly all aspects - including three negative ones: size, weight and price. Since Canon already has a 50mm f/1.4 lens, they would not release a slightly wider aperture version at a far higher price, size and weight without offering significantly better features and image quality. Otherwise, people simply would not buy the lens.

An Amazon Reviewer said:

If you ever want to shoot snapshots of downtown without a flash at midnight WHILE walking, this is the lens to have. I'm so in love with this lens.
For those who are concerned about the "back focusing" issue, I will let you know that I haven't experienced any backfocusing at all. I've let others shoot with it, wide open, within low-light environments and even the non-photographers were able to focus/shoot accurately.