Thanks to the inclusion of the Canon Floating System, superb image quality is insured at every aperture and distance in its focusing range.
Construction: 10 elements in 9 groups
Angle of view: 94 degrees
Minimum Aperture: F/22
Closest Focusing Distance: 8.8in
Filter size: 72
Lenshood: optional BW-72
Length: 2 1/4 in