http://www.usa.canon.com/cusa/support/professional/lenses/ef_lenses/ef_14mm_f_2_8l_usm?pageKeyCode=writeReviewPage
EF 14mm f/2.8L USM
7300
Specifications
Main Unit Spec
| Focal Length & Maximum Aperture | 14mm 1:2.8 |
| Lens Construction | 14 elements in 10 groups |
| Diagonal Angle of View | 114° |
| Focus Adjustment | Rear focusing system with USM |
| Closest Focusing Distance | 0.25m / 0.8 ft. |
| Filter Size | Rear Gel Holder |
| Max. Diameter x Length, Weight | 3.0" x 3.5", 1.2 lbs. / 77.0 x 89.0mm, 560g |