[OM] Re: ( OM ) DOF - was walk-around lens

[Brian Swale]

Hi Folks,

I thought we discussed this about 6 months ago. 

What I discovered then was that the DOF at any given aperture and any 
given focal length lens, is not necessarily the same from lens to lens.

Different designs may have different DOF.  

In a hurry; no time to research the background just now.

Brian

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