> Wayne Culberson <waynecul@xxxxxxxxxxxxxxx> wrote:
>
> Stupid question maybe, but if I put my vivitar 2x mf behind my 50/1.8
> to
> make a 100mm, I know I get equal to f/3.6 for light, but does the DOF
> effectively stay at 1.8?
DOF will be that of 100mm at the *effective* aperture (2x the marked aperture).
Wayne Harridge
http://members.optusnet.com.au/~w_harridge
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