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[OM] Re: Anomalies in E-1/OM Images

Subject: [OM] Re: Anomalies in E-1/OM Images
From: "Carlos J. Santisteban Salinas" <cjss@xxxxxxxxxxxxx>
Date: Sun, 9 May 2004 13:44:51 +0200
Hi, Scott and all.

>Some insist that they are caused by dirt or dust on the sensor.  If that
>is the case,
>then why are they not present in images taken with the 14-54 or 50mm Zuiko
>Digital or
>with the OM Zuiko 65-200?

A possible explanation would be the *effective* aperture on the lens. Dust
on sensor will show only at small apertures, and when doing extreme macro,
the *effective* aperture may be much smaller (higher f-number) than the
setting on the lens.

My 300D has also a dusty sensor :-( but is only an issue from f/16 and
beyond, which I rarely use.

Hope this helps,

...

Carlos J. Santisteban

<cjss@xxxxxxxxxxxxx>
<http://cjss.galeon.com>



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