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

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Subject: [Leica] Oyster Roast
From: images at InfoAve.Net (Tina Manley)
Date: Tue Dec 12 17:30:00 2006
References: <7.0.1.0.2.20061211122910.02609bc0@infoave.net> <8mtrn213q9ai8lj4v03b2ft4heig36ij87@4ax.com> <7.0.1.0.2.20061211194850.028c3440@infoave.net> <qpeun2lpbi45ea5oqlt68cnr9gl31ek4oh@4ax.com>
 
At 06:29 PM 12/12/2006, you wrote:
>2560, by my math.  640 underexposed by one stop would be 1280.  One stop
>less than 1280 is 2560.

This makes three different formulas that have been used to determine 
the ISO at 2 stops under with results ranging from 1280 to 
2560!!  Help!  I am a mathematics impaired person.  Which one is right?

Thanks!

Tina

Tina Manley, ASMP, NPPA
http://www.tinamanley.com
Replies: Reply from rangefinder at screengang.com (Didier Ludwig) ([Leica] Oyster Roast)
Reply from ricc at mindspring.com (Ric Carter) ([Leica] Oyster Roast)
 In reply to: Message from images at InfoAve.Net (Tina Manley) ([Leica] Oyster Roast)
Message from ericm at pobox.com (Eric) ([Leica] Oyster Roast)
Message from images at InfoAve.Net (Tina Manley) ([Leica] Oyster Roast)
Message from ericm at pobox.com (Eric) ([Leica] Oyster Roast)