Enthusiast. 03-20-2023 11:59 AM. Hiya, Rachel, sorry you're having this trouble. Your EOS R camera has a tiny black thumbwheel just to the right of the top right corner of the viewfinder eyepiece. That is the dioptre adjustment, it's for adjusting the viewfinder optics to match your individual eyesight. The Canon PowerShot G5 X Mark II is a compact camera renowned for its high-quality performance and advanced features. With a 20.1-megapixel CMOS sensor, it captures images with exceptional clarity and detail. The maximum image resolution of 5472 x 3648 pixels allows for stunningly sharp and vibrant photographs. Providing the image is in focus then their should be no strain on the eye so the dioptre adjustment setting is immaterial. OM User's gear list: Olympus OM-D E-M5 Olympus PEN E-PM2 Olympus M.Zuiko Digital ED 75-300mm 1:4.8-6.7 Olympus M.Zuiko Digital ED 12mm 1:2 Olympus M.Zuiko Digital ED 12-50mm 1:3.5-6.3 EZ +10 more. Solution. The Rubber Eyepiece Ring - the glassless ring covered with rubber - is attached to the viewfinder. Camera's standard diopter is -1 .2, while ten other kinds of screw in type dioptric adjustment lenses are interchangeable .The diopters of these lenses are adjusted solely for use with the F-1, Thus, the diopters of the lenses are not The camera's adjustable dioptric range is -2.5 to +0.5 dpt. Remove the eyecup. While grasping sides toward the bottom of the eyecup, slide it upward to remove. Turn the dioptric adjustment knob. Turn the knob to the right or left until the focusing points look sharp in the viewfinder. The diagram shows the knob set at the standard diopter (-1 dpt) Dual Pixel CMOS AF II. 4K60 10-Bit Video, HDR-PQ & C-Log 3. 30 fps E. Shutter, 15 fps Mech. Shutter. Show More. An ideal blend of performance and portability, the EOS R7 represents Canon 's move into APS-C with the mirrorless R system. Featuring a 32.5MP CMOS sensor and DIGIC X processing, this sleek powerhouse is capable of high-speed 30 fps The diopter wheel does not in any way change the focusing mechanism of the camera for actually taking pictures. What it does do: It changes the focal distance between your eye and the plane of the projection of the image within the EVF (or optical through the lens viewfinder if a camera has one). In other words, if you require a diopter of plus 3, simply add a plus 3 diopter to your camera. Neutral correction eyepieces do not replace the supplied standard eyepiece. The use of a neutral correction eyepiece will change the diopter value of the camera from minus one to zero. ECgcog.