| Year | 1981 |
| Lens Groups | 6 |
| Lens Element | 7 |
| Aperature Blades | 9 |
| Minimum Aperture | f/32 |
| Closest Focusing | 9.9999 m |
| Max. Magnifcation | 1:17.5 (0.057x) |
| Filter Size | 48 mm |
| Diameter x Length | 154 x 577 mm |
| Weight | 4230 gr (9.33 lb) |
| Hood | - |
This amazing lens along with its little sister the 600 f/4.5 are the reasons I developed the EdMika EF-FD 0.75mm thickness glassless adapter for my own personal use and then later for others who wanted to do the same as me. There is a lot of info on this and the 600 lens on my flickr photostream in this set for anyone interested: http://www.flickr.com/photos/ontarian/sets/72157623884845990/