10-16-2016, 07:13 PM
LiveView AF is AF-S or AF-F(ully) on Nikon - and it's definitely NOT the same. 
While AF-S ususally is the best way to get a super sharp still picture, AF-F is a box of surprises, rattling AF motors at very surprising moments - but it can do a great job (within limits) once one found out how to lock focus on a subject. I didn't know in the beginning, I need to push a button to lock it.
But to answer the suggestion: No, I don't care a single bit about "video performance". Why?
While AF-S ususally is the best way to get a super sharp still picture, AF-F is a box of surprises, rattling AF motors at very surprising moments - but it can do a great job (within limits) once one found out how to lock focus on a subject. I didn't know in the beginning, I need to push a button to lock it.But to answer the suggestion: No, I don't care a single bit about "video performance". Why?
- there's a reason for cine-lenses. Focus and zoom should not run away...
- each decent prime lens is good for video - it's the camera that gets troubles with AF
- there are also decent video cameras, costing a fraction of DSLR + lens and up to focus well
- to me, the whole DSLR video stuff is just marketing - saying, with a decent DSLR and some great primes you're cheaper off than with professional video stuff. Might be true, but a rig and lighting has to be bought as well, decent sound devices too - it still might be cheaper to film an advert with EOS1 or D810 or D5, but that's only valid for filmmakers - and they know which lenses to choose. To normal mortals each smartphone has better ergonomics.