topic Re: Constant focus shift on tap to focus in EOS DSLR & Mirrorless Cameras

EOS R8 Constant focus shift on tap to focus

JeffreyEttinge — Tue, 09 Dec 2025 16:16:18 GMT

I have my R8 in tap to focus mode. When I move the focus square by tapping on the center of my screen, the square very frequently will just shift on its own if I do not immediately shoot. Most often it shifts to the far-right side of the screen. I am constantly having to drag it back to center. How do I keep this from happening? I am using an EF lens with an RF/EF adapter. Could this have anything to do with it?

Re: Constant focus shift on tap to focus

Waddizzle — Mon, 08 Dec 2025 10:17:45 GMT

Welcome to the Canon Community Forums!

Are you using the rear display exclusively to control the camera? For acquiring focus on a subject? For firing the shutter, too?

Re: Constant focus shift on tap to focus

JeffreyEttinge — Mon, 08 Dec 2025 16:16:13 GMT

I am using the rear display touchscreen to set the focus point. I do not use it to fire the shutter. However, it just occurred to me that I am looking through the viewfinder also as I touch the screen and take the shot. Could it be that the proximity of my face to the screen is causing the focus point to shift?

Re: Constant focus shift on tap to focus

Waddizzle — Mon, 08 Dec 2025 18:06:37 GMT

“ However, it just occurred to me that I am looking through the viewfinder also as I touch the screen and take the shot. Could it be that the proximity of my face to the screen is causing the focus point to shift? “

Yes! The touch screen can be setup so that the top left corner can be used for touch control. Instead of the entire screen, you would only need to use a portion of it.

Re: Constant focus shift on tap to focus

JeffreyEttinge — Mon, 08 Dec 2025 23:22:37 GMT

Thanks! I changed the setting, and my preliminary test seems good. Focus point not shifting so far. When I look through the viewfinder my nose touches the right side of the screen, so that would explain the focus point going in that direction previously. I can still touch the right side of the screen though to move it there, which I guess is good, as long as it doesn't move when I look through the viewfinder.

Re: Constant focus shift on tap to focus

JeffreyEttinge — Mon, 08 Dec 2025 23:33:45 GMT

I also found that I had to re-register my custom shooting modes with those settings, otherwise they would default to the old settings.

Thanks again! I'll let you know if I have any more issues.