A superior-performance lens offering excellent optics and focusing from infinity down to one-half life size (0.5x). Its nine-element design features a floating optical system, which ensures top-notch performance even at close focusing distances. Light and compact, it functions beautifully as a general-purpose normal lens. The optional accessory Life Size Converter EF enables focusing down to life size (1:1), and actually increases working distance - very desireable in close-up shooting.
Focal Length & Maximum Aperture: 50mm 1:2.5Lens Construction: 9 elements in 8 groups Diagonal Angle of View: 46 DegreesFocus Adjustment: Front group linear extension system with AFD Closest Focusing Distance: 0.23m / 0.8 ft. (film plane to subject) Filter Size: 52mm Max. Diameter x Length, Weight: 2.7" x 2.5", 9.9 oz. / 67.6 x 63.0mm, 280g