T3D Re: DOF spreadsheet explanation

[john bercovitz <bercov@xxxxxxxxxxx>]

Bill Costa wrote:

> I guess I don't understand what "center of perspective viewing"
> means.  Do you have a pointer to an explaination of this concept?

Best would be a book every photographer should have:
"Optics in Photography" by Rudolph Kingslake
ISBN 0-8194-0763-1 
Go to
http://www.spie.org/web/abstracts/ose_titles.html
and then look for book PM06.  Best $50 you'll ever spend.  (IMHO)

Center of perspective is explained in the first few pages.  Later on,
the various types of formulas for depth of field are derived.

> Is the problem unpacking the zip file, or running the program
> itself.

I don't want to say; I'm embarrassed.  8*)

Thanks for the equations used in the web dof calculator.  I'm pressed
for time right now but will look at them later to see if I can figure
out what this negligible discrepancy stems from.

John B


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End of TECH-3D Digest 459
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