So a 90 or 105 mm lens only has the advantage of not blocking as much light,
and the 2.0 vs 2.8 is only effecting my viewfinder brightness, unless I have
to shoot at 2.0 in which case it will have less depth than at 2.8, which
would be the same depth on both lenses.
Scott
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Moose
Sent: Friday, March 16, 2007 4:49 PM
To: olympus@xxxxxxxxxx
Subject: [OM] Re: Mini Macro questions
Chuck Norcutt wrote:
> If you have the same image size on the sensor from two different focal
> lengths both images will have exactly the same depth of field at the
> same aperture.
>
Thanks to Dr. Focus. I rather thought that was the case, but didn't feel
confident stating it without calculation confirmation.
So in the case of a choice between 50/2 and 105/2.8, DOF is not an
issue, only viewfinder brightness vs. working distance.
Moose
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