The perfect Ultra-Telephoto lens to bring that exciting, long distance subject right into your picture. It features exceptional mobility, a quick and easy filter change system, and amazing macro capability. Like all other Sigma mirror lens series, it provides crystal clear image quality made possible by its special silver coated mirror system

Angle of view: 4 degrees

Optical construction: 6 elements in 6 groups

Diaphragm operation: Fixed

Filter size: 22.5mm rear 86mm front

Minimum focusing: 2m

Weight: 753 grams