Archived posting to the Leica Users Group, 2008/12/13

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
Subject: [Leica] Re: Half stop!
From: lrzeitlin at optonline.net (Lawrence Zeitlin)
Date: Sat Dec 13 14:49:38 2008
References: <200812132157.mBDLvF2t072954@server1.waverley.reid.org>
 
On Dec 13, 2008, at 12:50 PM, Marc James Small wrote:
Larry

With respect, it is a third of a stop, not a half-stop.  The European  
apertures are 1/3 of a stop different from the International scale  
which has been the norm since the 1950's.

Marc


Strange. I get 1.56 times increase in light transmitting power going  
from f3.5 to f2.8. Seems like half a stop to me. Do the math and tell  
me what you think.

Larry Z
Replies: Reply from jhnichols at lighttube.net (Jim Nichols) ([Leica] Re: Half stop!)