Originally posted by Ivor K Ecks From the online DOF calculator, a Pentax K5 with a 40mm lens at f8 at a distance of 10 feet will have a DOF of 6.6 feet. I do not understand how all of your toddler is not in focus.
Sharpest focus will still be the spot focused on DOF will allow acceptable focus within the range. hat being said there should be about 4 feet behind the main focus point in focus and 2 feet in front.
There is a reason the F8 and be there saying came around, it allowed enough DOF to capture a subject consistently when in a fast paced environement. On APSC in fact it could be f5.^ and be there since the DOF should be about the same as F8 on film
Perhaps a sample showing the issue would be best