Mount: Adaptall II (Interchangeable mount system)

15 elements in 11 groups
Angle of View:  34°-11°
Type of Zooming:  Push-pull
Diaphragm Blade Number: 7
Minimum Aperture:  F/32
Minimum Focus:  33.5in. (0.85m)
Macro Mag. Ratio 1:2.6
Filter Diameter: ø62
Weight: 30.3oz. (860gm)
Diameter x Length: ø2.7 x 6.1in. (ø71 x 154.5mm)