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R: [OM] Various lens sharpness numbers at various apertures

Subject: R: [OM] Various lens sharpness numbers at various apertures
From: "Marco Tomat" <tom@xxxxxxxxxxxx>
Date: Wed, 27 Jan 1999 17:27:21 +0000
Thumb rule: all leica format lenses designed till seventies' are at their
best around f/8. Some among recent design lenses are at their best from f/8
to wider apertures, till full aperture in some real excellent designs. This
regarding sharpness in ideal conditions. But in real life you may get more
sharpness by more DOF or (on the other side) by shorter times...

Marco
----------
>Da: Dave Bulger <dbulger@xxxxxxxxxxxxx>
>A: "OM List (E-mail)" <olympus@xxxxxxxxxxxxxxx>
>Oggetto: [OM] Various lens sharpness numbers at various apertures
>Data: Ven, 8 gen 1999 13:50
>

>After about 25 years of avid shooting, I'm just now getting into the more
technical aspects of this hobby/obsession/trade (i.e. I've just learned the
zone system) and I'm seeing more & more references to the fact that a lens
is not necessarily at it's sharpest stopped down to it's minimum aperture. 
This is gonna bug me until I know exactly what aperture each of my lenses is
sharpest at.



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