Hi all, first post so please be gentle
I've had my trusty 5D MkIII for years & it's been pretty darn reliable & robust but recently, totally out of the blue, it's developed a weird problem.
I generally shoot in Av mode in One Shot as most of my work is of static subjects & the cam is generally tripod mounted.
AF has decided not to work through the viewfinder. Sometimes it's back-focussing, others it's totally out of focus, nothing sharp.
However... when I shoot through LiveView no problem at all. Everything works as expected.
And... it gets weirder...
Shooting with my 24-70LII zoomed to 70mm an image will be in perfect focus, at 24mm it won't focus on the selected point (tends to back-focus) but interestingly if I take progressive shots at different focal lengths the focus problems worsen as I go towards 24.
Like I said... only through viewfinder, not LV.
Anyone have any suggestions?
I hate when I have to start considering my go-to camera as being unreliable.
ps - no, haven't installed any firmware updates within the time-frame of this problem starting.