The only drawback is that my camera is a M4-P, and the 28 mm frame cannot be seen in its entirety at the same time, because of the higher eyepoint. So I experimented with an appropriate screw-in correcting lens, but found myself half-blind except when looking though the finder. Diopter eye piece info. Jul 5, 2012. 1. This is really a bit of info for those interested. I had found that I had run out of adjustment on the built in diopter adjustment on my 5D3 and 7D it was as far as it would go for +1. This was right on the edge of what my eye needed so I got myself an EG+1 eyepiece. This now means I can effectively zero 1. Remove the eyecup. While grasping sides of the eyecup, slide it upward to remove. 2. Turn the dioptric adjustment knob. Turn the knob to the right or left until the AF point or the center spot metering circle looks sharp in the viewfinder. 3. Reattach the eyecup. If the camera' s dioptric adjustment still cannot provide a clear viewfinder R6 diopter question. Mar 12, 2021. Simple question. At about which point on the diopter wheel do things come into focus in the EVF on your R6? I personally recall things being in focus about half way, where that little nodule on the diopter wheel meets that little line right next to it. However, I’m somewhat suspicious that Canon didn’t It's a shame that built-in diopter adjustment didn't come along until the late 1980s. I don't know about Canons, but Nikons go -1 to +2 (I'd assume Canons are similar). If you need a +2 for your F-1, you'd be well in that range since the standard eyepiece is -1 and adding a +2 to it makes it a +1 total. BTW, although I'm now primarily a Nikon Diopter adjustment — On cameras with viewfinders, the diopter adjustment lets you focus the viewfinder. If everything looks out of focus when you hold the camera to your eye, even when autofocus 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). Adjusting the Viewfinder. Turn the dioptric adjustment knob. Turn the knob left or right to make the viewfinder display look sharp. The viewfinder and screen cannot be activated at the same time. At some aspect ratios, black bars are displayed on the top and bottom or left and right edges of the screen. These areas are not recorded. The adjustment range on both of these bodies is -3 to +1 dioptre, but the EOS R is the first I know of to have a wider range of adjustment, from -4 to +2. If your long- or short-sightedness is not too extreme you have a better chance of being catered for without a supplementary adjustment lens. -- hide signature --. In 2008 the EOS 5D Mark II and EOS 50D introduced Peripheral Illumination Correction. This adjusts images as they are shot on the camera to correct for vignetting or corner shading, making the brightness more even across the scene. This correction is designed to work with Canon lenses. If you're using a non-Canon lens, it can result in unwanted drSlH.