Richard CanonNews / Thursday, April 18, 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 70-200 F4.0 Canon's EF F4.0 lineup containing the 16-35,24-70, 24-105 and 70-200 is hugely successful for Canon and we're not surprised to see this patent application which for the first time shows one of the F4.0 lenses for the RF mount. This also looks like it may be a dual AF motor lense as well as it shows B1 and B2 as being AF focus driving units. Unlike the F2.8 70-200, this is not an extending zoom but internal zoom lens as the total lens length is not changing as the focal length changes. It's an RF lens because the lens back focus (BF) is considerably under the 44mm of the EF mount. Focal Length 7 2.20 130.45 194.20 F-Number 4.00 3.95 4.00 Angle of View 16.68 9.42 6.36 Image Height 21.64 21.64 21.64 Lens Length 215.54 215.54 215.54 BF 25.98 25.98 25.98 Also in this patent application is a Canon EF 58mm 1.4 lens, which also may feature a dual AF motor focus system. Focal Length 57.79 F-Number 1.44 Angle of View 20.52 Image Height 21.64 Lens Length 163.89 BF 39.99 US Patent Application 20190113708 Update: As it was pointed out to me the top image is of the 58mm 1.4 lens, the image below is for the 70-200mm. While this image doesn't show necessarily IS, there is an optical grouping that looks like it could be made to support IS. 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 Related articles Patent Application: Lens Auto-Aperture Control Patent Application for Canon RF 16-28mm F2.8, 16-28mm F2.8-4 and 16-28mm F4 designs Canon Patent Application: High Magnification Super Telephoto Zooms Canon Patent Application: Curious Catadioptric Optical System Canon Patent Application: Drone Camera Assembly Previous Article Canon Patent Application: Canon RF 50mm F1.8, RF 28mm 1.8 Next Article Canon Patent Application: Diffractive Optical Element Print Tags: Canon Patent ApplicationCanon RF 70-200 F4.0Canon EF 58mm 1.4 Please login or register to post comments.