Richard CanonNews / Thursday, February 21, 2019 / Categories: Canon Patents 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 Patent Application: More diffractive optics super telephotos Canon it seems is not quite done with researching diffractive optic patents, even though the 600/4 DO that we saw on prototype is starting to seem like a unicorn.This is a new patent application with the entire range of super telephotos from 400, 600 and 800mm listed as embodiments.Focal distance 582.00F number 4.12Half field angle (degree) 2.13Image height 21.64Whole length of the lens 394.25BF 62.79Focal distance 405.00F number 4.12Half field angle (degree) 3.06Image height 21.64Whole length of the lens 330.16BF 50.46Focal distance 795.00F number 5.60Half field angle (degree) 1.56Image height 21.64Whole length of the lens 490.24BF 105.13Japan Patent Application 2019-028317 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 Previous Article Canon Patent Application: Popup EVF Next Article Canon Patent Application: APS-C mirrorless kit lenses Print Tags: Patent ApplicationDIffractive OpticsDO Please login or register to post comments.