| Year | 1985 |
| Lens Groups | 10 |
| Lens Element | 15 |
| Aperature Blades | 8 |
| Minimum Aperture | f/32 |
| Closest Focusing | 2 m |
| Max. Magnifcation | 1:6.7 (0.15x) * |
| Filter Size | 58 mm |
| Diameter x Length | 71.4 x 172 |
| Weight | 710 gr (1.57 lb) |
| Hood | BT-58 |
| Beefiness | 1.03 |
This is an excellent lens. Some copies may have lens creep. I have several 16 x 20 Cibachrome prints made with this lens, hanging in my living room. Light construction and simple design make it easy to use--a steady hand or tripod helps at the 300mm end. Optics are superb for this lens and also the 80-200 f/4 little brother.
I used this lens on Sony NEX 5N via an adapter. The lens is very good in 100-200mm range, good resolution and contrast, very low CA, very smooth focus/zoom ring. Unfortunately, at 300mm this lens loses sharpness significantly, you may as well take picture at 200mm and crop it 1.5x and get similar results.