| Joined: | Thu Apr 12th, 2012 |
| Location: | Denham, United Kingdom |
| Posts: | 293 |
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The depth of field exists in front of and behind the point of focus ....typically 1/3 in front and 2/3 behind. So the considered wisdom is to focus 1/3 into the subject. In my experience it's not as precise as that and you still need to be careful you don't 'focus crop' key elements at the front or rear of the subject....that you WANT in focus.
Unless you happen to be using a Nikon 105DC or 135DC lens when the degree of defocus and the depth of focus within the area of acceptable sharpness is a variable. In the case of a portrait where one may well want the subject's nose and eyes sharp but be prepared to have the ears slightly soft these lenses allow that to be done. Great fun but much easier with the instructions that came with the lens.