[IMG]100 f/2.8L IS USM Macro Translation 1) Dual IS(tilt and shift) 2) UD glass for less diffraction 3) 9-piece round shape aperture 4) Internal Focus, ring USM and optimized algorithm achieving fast and quiet focus 5) full time manual focus weight: 625 gram (excluding accesories) filter size: 67 mm size: 77.7 x 123 mm[/IMG]