Re: hyperfocal

[Tom Deering <tmd@xxxxxxxxxxx>]

>I don't want to get too esoteric here and of course Tom is really correct in
>saying that in modern times, DOF does not vary with lens design (only
>aperture; the common misconception that it varies with shooting distance is
>also incorrect)...

I don't disagree with anything Eric said.

My comments were not meant to explain DOF calculations.  I was just 
offering a hypothesis to explain why the Sputnik manual could specify 
such seemingly far-fetched DOF numbers.  I think they just specified 
a very large value for "acceptable fuzziness."

While I can't match their numbers exactly, they appear to have used a 
COC of about 0.07 mm.  Myself, I would use the more conservative 
figure of 0.05 mm.  My number would yield a shallower DOF, but 
sharper pictures.

Tom