This lens is one of the fastest lenses available in this focal length for Canon FD mount cameras. Sharpness, contrast, and freedom from distortion are its strong points. Especially important is its ability to make photographs in low light conditions. Thanks to the inclusion of the Canon Floating System, superb image quality is ensured at every aperture and distance in its focusing range. The lens is composed of 10 elements in 9 groups. Its angle of view is 94 degrees and the minimum aperture is f/22. Closest Focusing Distance is 8.8in. Filter thread: 72mm.