BrettOssman wrote:
After reading quite a bit on DOF, still not sure about one thing.
Say your hyper focal distance is 25ft. If I move the focus point out beyond 25ft (say to 50 or 100ft), will the DOF still reach to infinity. Or as you move the focus point farther out, does the far end of the DOF move in accordingly?
I think I pretty much get the rest of the DOF concepts, just wasn't sure about the above.
If your hyperfocal distance is 25ft and you focus at 50 ft you will be doing the Buzz Lightyear focus - to infinity and beyond.
In real terms, if you focus at 25ft you will be in focus from about 12.5 ft to infinity.
If you focus at 50ft you will be in focus from about 20ft to infinity.
But - if you focus at 24ft then your far acceptable focus point will move in dramatically - probably from infinity to a couple of thousand feet. (Very rubbery figures used here just to give example)