Richard CanonNews / Sunday, November 12, 2017 / Categories: Lens Catalog This post may contain affiliate links(s). An affiliate link means I may earn advertising/referral fees if you make a purchase through my link, without any additional cost to you. It helps to keep this site afloat. Thank you in advance for your support. If you like what we do here, maybe buy me a coffee. Canon EF 400mm f/4 DO IS II USM Features Gapless Dual-Layer Diffractive Optics Large Diameter Aspherical Element Ultra Low Dispersion Element Protective Fluorine Coatings Ultrasonic AF Motor and Internal Focus Optical Image Stabilizer with 3 Modes Power Focus Mode; Full-Time MF Override Dust- and Water-Resistant Construction Rounded 9-Blade Diaphragm 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 Print Lens MountEFLens CategorySuper-Telephoto PrimesLaunch Date9/15/2014Launch Year2014WeathersealingRear FilterDiameter (mm)128Length (mm)233Weight (g)1200Min. Focal Length400Maximum Aperature4.00Min. Aperture32.00Min Focus Distance3.30No of Element Groups12No of Elements18Diaphragm Blades9Launch Price$6,899.00Amazonamzn.to/2gIRLaqCanon USAbit.ly/2iezguICanon USA Refurbishedbit.ly/2iezq5iB&H PhotoVideobit.ly/2AEpmLeAdoramabit.ly/2ABK1zI Please login or register to post comments.