Recently, my images started getting blurry when shot with the 24-105 f4 L on my 5D MK IV. It took awhile to realize it misses focus when I turn on IS on the lens. I have tried other lenses, they are fine. I tried the 24-105 on my 5D MK III and it ...
Ok, I have reset to factory defaults. I updated the micro adjustments for that lens. It's better. Still have more testing to do. I think it's most likely the lens and it should probably be refurbished or replaced. We'll see.That lens does stay on...
I agree. It was just a happy accident that IS was on and when I turned it off, it focuses correctly. I'll try the mirror lock up tomorrow. The mk IV has dual pixel AF. Not sure how that would matter. Thanks for your help.