| Year | 1951 |
| Lens Groups | 4 |
| Lens Element | 6 |
| Aperature Blades | 6 |
| Minimum Aperture | f/22 |
| Closest Focusing | 1 m |
| Max. Magnifcation | 1:33.3 (0.03x) * |
| Filter Size | 34 mm |
| Diameter x Length | 48 x 18 |
| Weight | 145 gr (0.32 lb) |
| Hood | - |
| Beefiness | 4.45 |
Photos tagged for the Canon 28mm f/3.5 (mkI) in the Canon Classics Flickr Group.