Richard CanonNews / Sunday, November 12, 2017 / Categories: Lens Catalog Canon EF 17-40mm USM Specifications for the Canon EF 17-40mm USM Lens Category and Release Details Lens Mount TypeEF Lens CategoryWideangle Zooms Launch DateFebruary, 2003 Initial Price$799.00 Lens Characteristics Diameter84mm Length97mm Weight500g Filter Thread77mm Rear Filter InstalledFalse WeathersealingTrue Focal Length17mm - 40mm Number of Elements / Groups12/9 Maxiumum Aperture4.00 Minumum Aperture22.00 Minumum Focal Distance0.28m Number of Diaphragm Blades7 Purchase Links for the Canon EF 17-40mm USM Canon USA Canon USA Refurbished Amazon B&H PhotoVideo Adorama Aperture Range: f/4-22 Three Aspherical Elements, One Super UD Ultrasonic Autofocus Motor Manual Focus Override Water and Dust Resistant Internal Zooming and Focusing Truly Circular Diaphragm 77mm Front Filter Diameter Rear Holder for Three Gel Filters Previous Article Canon EF 70-200mm f/4L USM Next Article Canon EF 70-300mm f/4.5-5.6 DO IS USM Print 1174 Richard CanonNewsRichard CanonNews Richard has been using Canon cameras since the 1990s, with his first being the now legendary EOS-3. Since then, Richard has continued to use Canon cameras and now focuses mostly on infrared photography. Richard is the founder and editor of CanonNews since 2017, and has worked as a writer on CanonRumors and other websites in the past. Other posts by Richard CanonNews Contact author Facebook page Please login or register to post comments.