| Year | 1960 |
| Lens Groups | 4 |
| Lens Element | 6 |
| Aperature Blades | 6 |
| Minimum Aperture | f/16 |
| Closest Focusing | 1.5 m |
| Max. Magnifcation | 1:11.1 (0.09x) * |
| Filter Size | 58 mm |
| Diameter x Length | 68 x 103.5 |
| Weight | 630 gr (1.39 lb) |
| Hood | - |
| Beefiness | 1.68 |
Photos tagged for the Canon R 135mm f/2.5 in the Canon Classics Flickr Group.