Richard CanonNews / Thursday, June 7, 2018 / 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: Canon 800mm 5.6 Canon appears to have filed a patent application on specifically a 800mm F5.6 lens. The patent attempts to help reduce weight, size while maintaining a high degree of optical performance and low chromatic aberrations. There are two embodiments, both are 800mm lenses. For example; Focal distance 780.00 F number 5.80 a half field angle (degree) -- 1.59 Image height 21.64 whole length of the lens 485.85 BF 128.77 Japan Patent Application 2018-087965 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: The first sniff of a new mount for Canon? Next Article Canon Patent Application: Stacked Sensor Patent Print Please login or register to post comments.