Richard CanonNews / Thursday, February 7, 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: Canon RF 70-300, Canon RF 100-400 In this patent application, Canon describes two lenses that are of special note and certainly required for the RF mount. A 70-300, possibly consumer grade, and an RF 100-400mm, and another consumer grade (possibly) 50-250mm Focal distance 102.21 195.97 389.86 F number 3.83 4.93 5.85 Half angle of view (degree) 11.95 6.30 3.18 Image height 21.64 21.64 21.64 Lens total length 204.85 250.29 291.30 BF 4.31 31.68 97.49 Focal distance 68.25 126.36 288.22 F number 4.16 4.68 5.83 a half field angle (degree) -- 17.59 9.72 4.29 Image height 21.64 21.64 21.64 Whole length of the lens 168.24 189.04 207.81 BF 12.70 30.65 79.58 Focal distance 51.80 126.89 241.22 F number 4.04 5.18 5.77 a half field angle (degree) -- 22.67 9.68 5.13 Image height 21.64 21.64 21.64 Whole length of the lens 136.91 175.70 210.70 BF 11.36 30.93 42.48 Japan Patent Application 2019-020679 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: Super Telephotos Next Article Canon Patent Application: Hybrid Optical and Electronic Viewfinder Print Tags: Canon Patent ApplicationZoom lenses Please login or register to post comments.