Canon EF 85mm f/1.2 L II USM

Retaining the impressive optical performance and large aperture of the original EF 85mm f/1.2L USM, this new medium telephoto lens uses a Ring-type USM, high-speed CPU and optimized algorithms to achieve an autofocus speed approximately 1.8x faster than the original. The high-speed AF and circular aperture create a shallow depth-of-field that brings attention to the subject and blurs the background, which is ideal for portraits and weddings. The floating optical system, which includes an aspherical lens element, suppresses aberrations and ensures excellent imaging performance.

Features
# Ring-type USM
# 85mm focal length
# 1:1.2 maximum aperture
# 28°30' diagonal angle of view
# 3.2 ft. / 0.95m closest focusing distance

Specifications
Focal Length & Maximum Aperture: 85mm 1:1.2
Lens Construction: 8 elements in 7 groups
Diagonal Angle of View: 28°30'
Focus Adjustment: AF with full-time manual
Closest Focusing Distance: 3.2 ft. / 0.95m
Filter Size: 72mm
Max. Diameter x Length, Weight: 3.6 in. x 3.3 in., 36.2 oz. / 91.5mm x 84mm, 1,025g (lens only)

The Digital Picture.com Says:

The Canon EF 85mm f/1.2 L II USM Lens is the widest aperture lens Canon currently makes (update: now the Canon EF 50mm f/1.2 L USM Lens shares this aperture) - allowing handholding and action stopping in the darkest conditions. The background blur capable of being produced by the Canon EF 85mm f/1.2 L II USM Lens is stunning.

Canon Website Customer Review:

This is a great piece of glass, but shooting at f1.2 results in such shallow depth-of-field that manual focus is essential. This is where the lens has a terrible fault. The focus ring is not really manual, it requires the camera to be turned on to power the focusing ring. The electronics translate manual focus into actual focus. The feel is very awkward, the ring feels too loose, and focus is not as precise. Also, to protect the lens from being stored in an extended position, it requires that you consciuosly refocus the lens to retract it before turning the camera off or changing lenses.