Richard CanonNews / Sunday, November 12, 2017 / Categories: Lens Catalog Canon EF 40mm f/2.8 STM Specifications for the Canon EF 40mm f/2.8 STM Lens Category and Release Details Lens Mount TypeEF Lens CategoryStandard Primes Launch DateJune, 2012 Initial Price$199.00 Lens Characteristics Diameter68mm Length22mm Weight130g Filter Thread52mm Rear Filter InstalledFalse WeathersealingFalse Focal Length40mm Number of Elements / Groups6/4 Maxiumum Aperture2.80 Minumum Aperture22.00 Minumum Focal Distance0.30m Number of Diaphragm Blades7 Purchase Links for the Canon EF 40mm f/2.8 STM Canon USA Canon USA Refurbished Amazon B&H PhotoVideo Adorama Aperture Range: f/2.8-22 Aspherical Lens Element STM Stepping Motor for Smooth, Silent AF Lightweight & Compact: 4.6 oz, 1" Long Lens Coatings Reduce Ghost & Flare 7-Blade Circular Diaphragm Minimum Focus Distance: 11.81" 64mm Equivalent on APS-C Cameras STM Focus in Video on Select EOS Rebels Previous Article Canon EF 24-70 f/2.8L II USM Next Article Canon EF-M 22mm STM Print 1325 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.