Re: acutance -- resolution

[T3D john bercovitz <bercov@xxxxxxxxxxx>]

> Zeiss has always supported engineers and allowed them to publish, and their
> legacy of technical papers is as solid as their advertising is mushy.  If
> it's worthwhile & somewhat old, any chance of scanning this pamphlet?

It's just a short, non-technical, pamphlet and I think it's still available 
from Zeiss.  If I can find it I'll scan it.

I think we need a good way to differentiate between contrast and acutance.
Like you, I've thought of acutance as chemical depletion of adjacent areas
in film but I think Zeiss used the word and was talking about lenses.  Also
it would be good to define sharpness as John Ohrt and LeRoy Barco used it.  
Is it resolution or acutance or contrast or all of the above?

But getting back to the original question, how does this fit in with images
of objects which are not in focus?  (And yeah, I know, philosophically, that
tradeoffs are made in lens design.  I just want to know more specifically about 
how out of focus images can be made sharper without stopping down.)

Thanks,
John B


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