> Richard F. Man <richard@xxxxxxxxxxxxxx> wrote:
>
> I understand that for example, the 2X converter loses 2 stops of
> light. Q
> is whether that would increase the DOF accordingly. My intuition is
> that it
> doesn't.
>
Your intuition is correct if you use a 2X with a 200mm lens you will have the
same
depth of field as a 400mm lens at twice the marked aperture, i.e. if the marked
aperture is f5.6 then the "real" aperture with the teleconverter is f11.
Wayne Harridge
http://members.optusnet.com.au/~w_harridge
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