Richard CanonNews / Thursday, May 23, 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: Improved DSLR Viewfinder Several factors come up with viewfinders; we want one where the aberrations are low, the magnification is high and the eyepoint is large enough for those that wear glasses. In this patent application Canon appears to be trying to improve on aberrations and magnification while maintaining a long eyepoint. They also mention in this document that the standard viewfinder has a 65mm focal length, and a .8x magnification with a 50mm lens. Assuming it's a straight ratio, it would appear that Canon is looking at doing a 1.00x magnification viewfinder in this patent application. However, patent documents described above In the prior art disclosed in No. 1, the focal length of the eyepiece is about 65 mm, and the finder magnification is about 0.8 or less when the standard lens with a focal length of 50 mm is mounted as a photographing lens. Therefore, in a camera using a so-called APS-C size sensor in which the size of the image circle is smaller than a 35 mm film, the finder image becomes smaller than the conventional silver halide film camera. Further, in the prior art disclosed in Patent Document 2, although the finder magnification is as high as about 1 time, it is difficult to sufficiently correct axial chromatic aberration and lateral chromatic aberration. Therefore, an object of the present invention, while increasing the magnification while maintaining high optical performance, is to provide a finder optical system capable of ensuring long eye point. Could this be a new viewfinder that will appear on the 90D? It's entirely possible. If the 90D is to take the place of both the 80D and the 7D Mark II, one of the features must be an improved viewfinder. Japan Patent Application 2019-078959 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 Canon Strategy Conference 2024 Canon EOS R50 V Review New Rumors Rundown: Lenses and the EOS R7 Mark II Patent Application: Canon RF-S14-30mm F4-6.3 IS STM PZ USA Tariffs May affect Canon Cameras and Japanese Camera Equipment Previous Article Canon Patent Application: Image Stabilization on Tilt-shit lenses Next Article Canon Patent Application: Celestial AF "Moon shooting mode" Print Tags: CanonPatent ApplicationDSLR Viewfinder Please login or register to post comments.