Quoting Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>:
deleted lots of info on CoC, print resolution, etc.
> Now, back to the DOF scale on the lens. When using an OM
> lens on an E-1
> the 2X difference in final print resolution equates to a
> 2 stop
> difference in DOF for the same focal length. If the OM
> lens is set at
> f/8 then add 2 stops and read the DOF from the scale for
> f/16. For
> example refer to the calculator at
> <http://www.dofmaster.com/dofjs.html>
> Set the format for 35mm, focal length at 50mm, focus
> distance at 10 feet
> and aperture at f/8. You'll find that the DOF is shown
> as 7.77 to 14
> feet. Now change the format to E-1 (which is actually
> just cutting the
> CoC in half) and set the apeture to f/16. You'll find
> that the DOF is
> exactly the same.
snip
> Sorry if I've repeated somebody's response. I've been
> out of town for
> nearly a week and am trying to catch up on digests.
>
> Chuck Norcutt
Well, I may have anticipated you this morning in a fumbling
way, but I'm not sorry to have your explanation, and no one
takes me seriously anyway (myself included). Thanks for
this. Goes to the keeper file.
Hope to remember some of this when the OM adapter has
actually arrived 2-3 weeks hence.
Joel W.
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