Originally posted by Pål Jensen No problems with birds in flight. Not for a couple of decades.
None? That's the classic example of where Pentax autofocus lets me down: Pull out K-30 or K-3ii, attach 55-300 screw-drive lens, point at bird or airplane flying in bright blue sky, hit autofocus, and whirrrrrrrrrrrrrrrr... everything goes blurry, and the flying thing is gone.
Can you use techniques to help with that, or minimize it? Sure, quick shift to get close, f/7.1 or more for depth of field and let ISO float high, keep everything centered, use back-button. Buy a PLM. But I've had that happen multiple times every time I've tried to shoot birds or airplanes. Sometimes it happens with other subjects like sports.
I doubt a Nikon shooter would claim he has
no issues with BIF.