Archived posting to the Leica Users Group, 2006/12/06

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Subject: [Leica] Math Question
From: davison_m at msn.com (MARK DAVISON)
Date: Wed Dec 6 12:58:56 2006
 
Tina,

Just multiply the ISO rating by 2 for each stop of underexposure.

For 2 stops under:  2 x 2 x 160 = 640.

For 3 stops under: 2 x 2 x 2 x 160 = 1280.

Mark



>From: Tina Manley <images@InfoAve.Net>
>Reply-To: Leica Users Group <lug@leica-users.org>
>To: Leica Users Group <lug@leica-users.org>
>Subject: [Leica] Math Question
>Date: Wed, 06 Dec 2006 15:25:23 -0500
>
>LUG:
>
>If I take a photo at ISO 160 but underexpose by two stops, what is the 
>effective ISO that I'm using?  How about three stops under?
>
>Thanks,
>
>Tina
>
>
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In reply to: Message from images at InfoAve.Net (Tina Manley) ([Leica] Math Question)