Black Lens structure (elements/groups): 8/6 Closest focusing distance: 0.9 m This lens features a large aperture and compact size. The first lens group moves for rear focusing. And sharp, crisp pictures are obtained at all apertures. The background blur is ideal for portraits. The USM autofocuses the lens quickly and quietly.- Focal length and maximum aperture: 100 mm 1:2.- Lens construction: 8 elements in 6 groups.- Diagonal angle of view: 24°.- Focus adjustment: Rear focusing system with USM.- Closest focusing distance: 0.9m / 3ft.- Filter size: 58mm. Lens system Closest focusing distance 0.9 m Lens viewing angle, diagonal 24° Lens structure (elements/groups) 8/6 Design Product colour Black Weight & dimensions Filter size 58 mm