Okay, this is almost killing my photography. Just recently (probably the last couple weeks to a month) I have been really having a hard time MF. Here's what happens: when it looks in focus to me in the viewfinder it's actually front focused. So I have to guess at things by back focusing. Also, when using AF it's the same thing—it never looks in focus but when I correct it and get it to look right, it's FF! So it's pretty much a guess at MF or just "trusting" that AF is right. Of course, once I pull it up on the screen I can see exactly how it turned out, but for fast-action photography it doesn't work for me to be constantly be looking at my photos on the screen.
I run the diopter all the way at -; I've tried pushing it up (+) but that makes things worse.
So, the big question—did something happen in the viewfinder of my K-5 or are my young eyes aging really quickly???
(btw, this has just recently started happening to me, I use to not have any problems at all)