thanks for the inputs everyone
Quote:
Originally Posted by rowan
It's really the lens aperture (how much light is let in) that determines the DoF, not the distance to the subject. A smaller f- number will result in more DoF blurring, but it also needs more careful focussing.
Wide open means literally that, the aperture diaphragm inside the lens is wide open.
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i agree that these 2 aspects are quite important but focal length and distances must be figured in to the equation if one is out to achieve DOF type shots.
for instance, f2.8 at 18mm will not have the DOF of f2.8 at 20mm focal length, in fact, most any aperture at wide angles will keep the background relatively focused.