Richard CanonNews / Sunday, November 12, 2017 / Categories: Lens Catalog Canon EF 300mm f/4L IS USM Specifications for the Canon EF 300mm f/4L IS USM Lens Category and Release Details Lens Mount TypeEF Lens CategorySuper-Telephoto Primes Launch DateApril, 1997 Initial Price$1,499.00 Lens Characteristics Diameter90mm Length221mm Weight1190g Filter Thread77mm Rear Filter InstalledFalse WeathersealingTrue Focal Length300mm Number of Elements / Groups15/11 Maxiumum Aperture4.00 Minumum Aperture32.00 Minumum Focal Distance1.50m Number of Diaphragm Blades8 Purchase Links for the Canon EF 300mm f/4L IS USM Canon USA Canon USA Refurbished Amazon B&H PhotoVideo Adorama Aperture Range: f/4-32 Two UD Lens Elements Two Mode Optical Image Stabilization Ultrasonic Focus Motor Manual Focus Override Minimum Focus Distance: 4.9' Detachable Tripod Collar Fits Extenders EF1.4X II and EF2X II 77mm Filter Diameter Previous Article Canon EF 135mm f/2.0L USM Next Article Canon EF 75-300mm f/4-5.6 III USM Print 1508 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.