Mount: Adaptall II (Interchangeable mount system)

9 elements in 8 groups
Angle of View:  75°-34°
Diaphragm Blade Number: 6
Minimum Aperture:  F/22
Minimum Focus:  27.5in. (6.7m)/70mm 0.34in. (0.34m)/macro
Macro Mag. Ratio 1:4
Filter Diameter: ø52
Weight: 6.8oz. (194gm)
Diameter x Length: ø2.5 x 2.3in. (ø64.5 x 62.5mm)