Go to http://www.dofmaster.com/dofjs.html and use a custom CoC figure of
0.015mm
--
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of James Royall
Sent: 27 March 2005 08:52
To: olympus@xxxxxxxxxx
Subject: [OM] Figuring out depth of field with 4/3 adaptor
My adaptor finally arrived yesterday. The message from Hamburg that it was
on its way on the 11th in fact meant that it would be sent from the Czech
Republic on the 22nd. It then only took four days to get here, including a
holiday. At first play, it seems to work ok in aperture priority mode,
though the instruction sheet does say spot metering is unavailable.
But how do I work out depth of field using the scale on the lens? Using the
24mm (which becomes a 'standard' 48mm) on an OM at F8 gives an indicated
depth of field of just over a meter to infinity. Can I do something simple,
like looking at the DOF for F4 when used with a 4/3 sensor? Or do I have to
take along my 50mm and see what DOF that would give me on an OM at F8? Or am
I going to have to have to take some chalk, draw a huge 30 meter ruler on
the street outside and work out my own scale?
James
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