Richard CanonNews / Monday, November 13, 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 Extender EF 1.4x III 1.4x Magnification Factor Microcomputer Controlled Communication Between Lens & Camera Spectra Coating Reduces Ghosting/ Flare Protective Fluorine Coating Dust and Water Resistant Compatible with Select EF Mount Lenses 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 CategoryExtenderLaunch Date8/26/2010Launch Year2010WeathersealingRear FilterDiameter (mm)72Length (mm)27Weight (g)225No of Element Groups3No of Elements7Launch Price$449.00Amazonamzn.to/2iFjrBoCanon USAbit.ly/2hugEuGCanon USA Refurbishedbit.ly/2huNdbOB&H PhotoVideobit.ly/2AH0AujAdoramabit.ly/2AGtgDC Please login or register to post comments.