This lens provides outstanding versititily in any light with its fast F/4 maximum aperture coupled with excellent balance and light weight for convenient hand-held shooting. In order to keep size to a minimum for its aperture, the Rear Group Focusing System is employed. Spherical and chromatic aberrations have been corrected to near-perfect levels, thanks to a new optical design. This lens also offers vari-pitch cam-type focusing mechanism for exceptionally light and fast focusing. A detachable tripod mount is provided as is a filter holder for economical 34mm drop-in filters. SPECIFICATIONS: * Type: telephoto * Construction: 6 elements in 6 groups * Angle of view: 8 degrees 15 minutes * Minimum Aperture: F/32 * Closest Focusing Distance: 10ft * Filter size: drop-in type 34mm with holder * Lenshood: Built-in * Length: 8 in * Weight: 34oz. w/tripod mount