Archived posting to the Leica Users Group, 2008/01/10

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Subject: [Leica] Obsolete Standards Question- Marc
From: philippe.amard at tele2.fr (Philippe AMARD)
Date: Thu Jan 10 23:16:32 2008
References: <003401c853d0$a2b4ccc0$e81e6640$@net> <a3f189160801101356g5d052035k9b22da75770d53be@mail.gmail.com> <47869558.5000105@tele2.fr> <200801102210.m0AMANGD086852@server1.waverley.reid.org>
 
 From your example , it is not doubling, it is: 3 DIN points are 
equivalent to a 100 ASA increment
Which is right? doubling? or incrementing?
TIA
phx

Marc James Small wrote:

> At 04:59 PM 1/10/2008, Philippe AMARD wrote:
>
> DIN is a different scale from ASA.  Effectively, every doubling of ASA 
> speed is equivalent to an increase of 3 in DIN.  21 DIN = 100 ASA,   
> 24 DIN = 200 ASA.  300 ASA =  27 DIN.
>
> Marc
>
>
> msmall@aya.yale.edu
> Cha robh b?s fir gun ghr?s fir!
>
>
>
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In reply to: Message from jshul at comcast.net (Jim Shulman) ([Leica] Obsolete Standards Question)
Message from sonc.hegr at gmail.com (Sonny Carter) ([Leica] Obsolete Standards Question)
Message from philippe.amard at tele2.fr (Philippe AMARD) ([Leica] Obsolete Standards Question)
Message from marcsmall at comcast.net (Marc James Small) ([Leica] Obsolete Standards Question)