The simple answer is, "Don't go past f/16." In fact there's some
deterioration there.
At f/32 nothing is in focus. For magnifications over 1/4, use 16/(m+1) as
the limit.
Paul Farrar
----- Original Message -----
From: "Steve Goss" <stevegoss@xxxxxxxxxxxxx>
To: "olympus-digest" <olympus@xxxxxxxxxxxxxxx>
Sent: Friday, August 23, 2002 9:36 PM
Subject: [OM] Diffraction limitations?
> Ok, I keep hearing about how smaller apertures give greater depth of
> field and apparant sharpness to a point, and then the increase is
> nullified by a rise in diffraction.
>
> My question is this: at what point does this happen? I'm not looking for
> the mathematical equation to figure it out, I just want to know for a
> given 35mm lens of a given length, say 25, 50, 100, 200, or 300, what
> would be the best aperture for sharpness.
>
> Thanks, Steve Goss, Dallas Tx usa
>
>
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