Component for: SLR Black Lens structure (elements/groups): 4/3 Closest focusing distance: 0.24 m This optional accessory is designed to work strictly with the EF 50mm f/2.5 Compact Macro lens. Unlike typical life-size adapters, the Life Size Converter EF actually has optics that are optimized for high magnification when combined with the 50mm macro lens. Magnifications from 0.26x (approx. 1/4 life-size) to 1.0x (true life size) are possible, at increased working distances. Lens system Closest focusing distance 0.24 m Lens mount interface Canon EF Lens structure (elements/groups) 4/3 Component for SLR Design Product colour Black Weight & dimensions Weight 160 g Length 34.9 mm Diameter 6.76 cm