Optics: 8 elements in 8 groups.
Diaphragm: 6 blades stopping down to f/22.
Close Focus: 1.6 ft (0.5m).
Maximum Reproduction Ratio: 1:6.7.
Filter Thread: 52mm, metal. Rotates only with focus.
Hood (optional): W-62.
Size: 3.42" (86.96mm) extension from flange x 2.48" (62.97mm) diameter.
Weight: 10.750 oz. (304.7g).