T3D Re: DOF equal and ?

[john bercovitz <bercov@xxxxxxxxxxx>]

I hope I'm not flogging a dead horse but here's another thing
we could use as a touchstone for comparison.  I haven't looked
at this in a long time so my numbers may not be exact but 
here's the idea:  Someplace in Kingslake's book there are two 
photos together on the same page.  One photo was taken with, 
say, a 12" lens with 1" linear aperture (entrance pupil diameter) 
and the other was taken with, say, a 6" lens with 1" aperture.  
An area of the photo taken with the 6" lens was blown up 2X 
to match the photo taken with the 12" lens.  It is very clear 
that the two photos display exactly the same DOF.  Does this 
fit in with what you're saying, Bob?

John B    http://www.angelfire.com/ca2/tech3d/index.html


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