Quick related, semi-related question about this focus disable and the metering settings. I'm still learning, and used to a 20D, but I'm getting more serious into this but had a quick question. I normally would shoot full manual on my 20D and I had to control everything, the exposure, shutter, iso and all that- like you all probably know, and I made the jump to the 5D3 and have been doing what reading and learning I can however one thing I'm in the dark about or just not getting is the metering part.
Why would I want to leave metering on during the 1/2 shutter depression? From my understanding, metering is the camera sensing how much light is coming in, balancing the scene if you have auto iso enabled and if you focus, recompose, but in doing so, if you re-meter the central area of the image (or does the metering just work for the whole image...?) isn't there the chance to throw off what you wanted the prime focus to be?
Hopefully someone can help me out here, I'm pretty confused and not even sure I stated my question correctly ><. Just trying to understand this whole Auto ISO (when enabled), metering, AF and AE buttons on the back of the 5D3 and all of that to better take advantage of the camera. If someone has a question for clarification of what I mean, I'll try and respond as soon as I can. Until then- dinner
Thanks for any help you can provide!