Usually, a good macro lens will be at its sharpest 2 or 3 stops down from
wide open. At that point, it is almost diffraction limited. There will be
some resolution loss as the lens is stopped down. However, as on some
lenses, the resolution should not drop off "like a home sick rock".
Bob Rapp
----- Original Message -----
From: "Joseph Tainter" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, June 12, 2001 7:15 AM
Subject: Re: MZ-S and FA200/4 Macro
> Doug, I've just gotten a 100 mm. macro myself, and am playing off depth
> of field (f-stops 16-32) vs. sharpness (f-stops around 5.6-11). This
> photo looks like it has a lot of depth of field for a 200 mm. macro.
> What f-stop did you use?
>
> I keep reading that macro lenses are designed to be sharpest stopped
> down, but putting my 1p in mtf mode gives me f8 in macro mode with my FA
> 100 f2.8 macro. So I'm puzzled, because I want both sharpness and depth
> of field.
>
> Thanks,
>
> Joe
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