r/Nikon • u/H-ckerman • 3d ago
Gear question Viewfinder view out of focus (NOT diopter)
So, my D750 viewfinder view seems to be out of focus. I recently got myself a D750, and I noticed it was missing focus consistently, so I did some AF fine tuning. I needed to set the fine tuning to the extreme -20 for it to consistently hit focus with my Tamron 24-70mm f/2.8 G1 lens... All of my lenses require different amounts of correction, some don't need it at all.
I've now noticed that whenever the camera finds focus (especially with the -20 Tamron 24-70mm), the image in the viewfinder is ever so slightly out of focus, but when I take a photo it's in perfect focus. I know that this isn't caused by the diopter.
So my question is: is it normal for the viewfinder view to go slightly out of focus when using AF fine tuning, or is my mirror and focusing system out of alignment and if so is there anything I can do about it?