| Canon EF 20mm f/2.8 USM Specifications | |
| Frame Coverage | 35mm |
| Lens Construction (groups) | 9 |
| Lens Construction (elements) | 11 |
| No. of Diaphragm Blades | 5 |
| Minimum Aperture | 22 |
| Closest Focusing Distance | 0.25m (9.8") |
| Maximum Magnifcation | 0.14x |
| Filter Diameter | 72mm |
| Maximum Diameter x Length | 77.5mm x 70.6mm (3.1" x 2.8") |
| Weight | 405g (14.3oz) |
Reviews
Source
The-Digital-Picture.com
If all you can afford is the Canon EF 20mm f/2.8 USM Lens, buy it and enjoy it. It will capture memories just fine.
Photodo.com
As a wide-angle lens for cropped sensors, this lens falls a little short, with virtually all of the standard zooms giving a wider angle of view. However, on the full frame sensors that Canon are now producing, this lens still warrants its place in their line-up.
William Castleman
The EF 17-40mm f/4L lens is a very sharp, high contrast zoom lens with performance characteristics that often match and sometimes exceed those of quality prime lenses at wide angle.
