Hi! I'm trying to figure out how to achieve two focus settings on my D3100 that I had on my film SLR camera that I really miss.
The first one is a setting where the entire frame is in focus. I understand setting depth of field using various f-stops but that doesn't always help. For example, when I'm in a situation where the lighting is low and I can't use a flash, but I want an entire group of people in focus, I switch to Auto-area AF. Sometimes, only one or two of the focus points will lock and not everyone's face is in focus. Is there a way to make all 11 points lock so the entire frame is in focus?
Secondly, I also miss the "infinite" focus option I had on my old SLR. I was trying to take photos of lightening a few weeks ago. Since it was too dark for AF, I switched to manual. I tried turning the focus ring all the way to the right so everything in the distance would be in focus. They looked good on my screen, but on the computer they were blurry. How do I manually focus the camera in such a situation?
Thank you for any help and feedback!