Mount: Adaptall II (Interchangeable mount system)
16 elements in 14 groups
Angle of View: 75°-12.5°
Diaphragm Blade Number: 6
Minimum Aperture: F/22
Minimum Focus: 31.5in. (0.8m)
Macro Mag. Ratio 1:6.3
Filter Diameter: ø72
Weight: 15.8oz. (448gm)
Diameter x Length: ø2.9 x 3.0in. (ø74.5 x 77mm)