Discussion
If you are shooting a photo and want to get a greater depth of field in the image, you would shoot at :
Answer: B
For greater depth of field you would shoot at F16.
The f-number is the focal length divided by the aperture diameter, so a larger f-number means a smaller aperture. A small aperture narrows the cone of light from each point, so objects in front of and behind the focus stay acceptably sharp, giving a greater depth of field. That is why evidence and crime scenes are photographed at small apertures such as f/16.
F2.8, F4 and F7.1 are wider apertures, giving progressively shallower depth of field; f/2.8 throws everything outside the plane of focus out of focus.
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