Video: Auto Focus Vs. Manual Focus
 

The most common question I get is "How important is it to use Auto Focus Vs. Manual Focus".

Here is a short 1 minute video that will help aid you in understanding Auto Focus Vs. Manual Focus.

Video - 4mb

Do you have to keep re-focusing as it gets closer?

Yes...however it depends on exactly how far your target (point of focus) is away from the lens.

This guy was far enough away where I maxed out the focus and was able to not touch the focus at all the entire time once I get it set.