Construction:11 Groups/ 14 ElementsAngle of view:27°02' (for full frame 35mm format cameras) 17°37' (for APS-C format cameras)F stop range:2.8-32Closest Focusing Distance:11.8''Working Distance:5.5''Maximum Magnification:1:1Diaphragm Blades:9 (rounded diaphragm)Filter Size:58mmWeight:19.4oz.・State-of-the-art optical and image stabilizing technologies combine to create a new 90mm macro・New eBand (Extended Bandwidth & Angular-Dependency) Coating reduces undesirable flare and ghosting to an absolute minimum・Fast F/2.8 aperture throughout the zoom range・Delivers high resolution with 2 XLD (Extra Low Dispersion) 1 LD elements・New VC anti-shake mechanism with 4-stop advantage・USD (Ultrasonic Silent Drive) powers a speedy AF drive together with continuous manual focus control (Full-Time Manual/FTM)・Internal Focusing ensures a broad working distance since the length of the lens doesn't change・Full time manual focus (FTM) for fine-focus adjustments without the need to change focus modes on camera or lens・Moisture-resistant construction helps prevent water from penetrating the lens・A rounded diaphragm retains a nearly circular shape even at two stops down from its fully open F/2.8 aperture for beautiful bokeh

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