sean mclennan wrote:Being a pro photographer for 15 years I can tell you that in reality, Auto Focus sucks. The most advanced AF systems on the planet...that only have to focus for a single frame or series of small burst...FAIL occasionally. How can you depend on a system that might fail when you're shooting video/film? $50K takes...oops, need to reshoot, AF missed the shot.
This is why most cinema production is manual focus. You can count on the skill of a trained FP more than any type of automated AF.
I know it's a pain, but the best thing you can do is learn to focus on the fly and practice. That skill will never lose it's importance any time soon!
I completely understand - but you'd never use the FOCUS button for critical focus, it's more of a quick starting point.
If we were talking an Alexa or F55 obviously this wouldn't even be a discussion point. If you're shooting with a focus puller, or if you have a follow focus on the rig - again, it's not an issue. However, I'd imagine there will be a huge amount of people using these Blackmagic Camera's for run-and-gun documentary, home videos, school concerts, corporates, weddings, etc.
There's a reason why they included auto-focus on the RED Scarlet/EPIC - and it actually works
really well. We use a EPIC + Canon stills EF glass all the time - and the auto-focus is incredibly handy for run-and-gun.
Would I use the FOCUS button every shot? Hell no. Would I use it on a documentary where I've only got a very small rig (i.e. no follow focus and Canon EF glass) something just unexpected happens and I just need to quickly start rolling? Hell yes.
It's just another tool for the job. If I had this option, then I would be able to get away with just pulling the focus straight off the Canon EF glass - rather than either "cine-fing" the lenses and using a proper follow focus, or strapping on a "temporary" follow focus.
My 2c. I'll stop banging on about it now! It is an audio thread after all!