Richard CanonNews / Thursday, October 11, 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: EF-M 18-55 with variable field curvature This patent application describes a lens that has variable field curvature and a reduction of spherical aberrations. This is an APS-C mirrorless lens, as indicated by the image height of 13.66mm and the back focus of 11.55mm. The full lens particulars are; Focal distance 18.58 53.49 F number 3.56 5.87 Field angle 36.32 14.32 Image height 13.66 13.66 BF 11.55 11.55 Focal distance 18.54 53.37 F number 3.5 5 5.86 Field angle 36.39 14.36 Image height 13.66 13.66 BF 10.14 10.14 Japan Patent Application 2018159876 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: Organic Sensor Next Article Canon Patent Application: Backside illuminated sensor method of manufacturing Print Please login or register to post comments.