Digital BW, The Print

> .. Is there any way to get the Canon FD
> lenses to work with the Digital Rebel X? 

When I switched from FD to EF, I sold all my FD lenses because it appeared
the only converters would not allow infinity focus.  I'm not sure what
exists today, but I doubt it's possible to salvage them.

> ..  do you compute
> dof for the nominal focal length of a lens or its actual focal length
> given the digital camera's sensor?  I assume it is the latter.

Both are relevant.  I don't have the formulas handy, but what I have found
over the years is that for the sharpness I like for 16 x 20 I usually need
at least 2 stops smaller than the lenses and charts indicate.  However, the
smaller format sensor is going to magnify the circle of confusion more for
any given print size.  So I assumed I'd need even more   In empirical
testing I found that I need 3 stops more than the 35 mm camera charts call
for.  When we're talking about an 18 mm lens that is good at f16, however,
the DOF is still tremendous.  It looks like I can get 2.5 feet to infinity
sharp in a single frame.

Paul
www.PaulRoark.com