EF 100-300mm f4.5-5.6 USM

introduced 1990

Focal length and maximum aperture: 100-300mm 1:4.5-5.6
Lens construction: 13 elements in 10 gourps
Diagonal angle-of-view: 24°-8°15'
Focus adjustment: ring type USM, rear focusing system, full-time manual focus
Closest focusing distance: 1.5 m/ 4.9 ft. (Macro), 0.2 x magnification
Zoom system: rotation type
Filter size: 58mm
Max. diameter x length, weight: 73 x 121.5mm, 540g