> On Mon, Apr 06, 2009 at 10:32:37PM +0100, Bob W wrote: > > > So, if I'm willing to trade resolution for depth of > field, am I better > > > off using a wider angle lens and cropping (my intuition > says yes), or > > > do I get the same benefit by just combining pixels (which > would also > > > reduce noise) for a larger circle of confusion? > > > > > > > To calculate the nearest (dn) and furthest (df) points in > focus use the > > following formulae: > > > > dn = U * F^2 / [F^2 + (U * c * f)] > > df = U * F^2 / [F^2 - (U * c * f)] > > Ah. Thanks. Focal length is second order factor, circle of confusion > is first order, so focal length has a greater effect on DOF, than > CoC (pixel size). >
Circle of confusion is not pixel size. Bob -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
