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

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Subject: [Leica] Re: Half stop!
From: jhnichols at lighttube.net (Jim Nichols)
Date: Sat Dec 13 20:27:08 2008
References: <C569DF2A.466B9%mark@rabinergroup.com>

Hi, Mark,

Glad we can agree.  Especially since the HP that I use makes use of a 
reverse-Polish notation system. ;-)

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Mark Rabiner" <mark@rabinergroup.com>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Saturday, December 13, 2008 8:52 PM
Subject: Re: [Leica] Re: Half stop!


>
> On my EPSON CALCULATOR, 3.5 to 2.8 is ALSO about three-quarters of a stop.
> 4.0 to 2.8 is the normal full stop increase.  Same as my CANON Calculator!
> :)
>
>
>
> mark@rabinergroup.com
> Mark William Rabiner
>
>
>
>> From: Jim Nichols <jhnichols@lighttube.net>
>> Reply-To: Leica Users Group <lug@leica-users.org>
>> Date: Sat, 13 Dec 2008 18:46:46 -0600
>> To: Leica Users Group <lug@leica-users.org>
>> Subject: Re: [Leica] Re: Half stop!
>>
>> On my trusty HP calculator, 3.5 to 2.8 is about three-quarters of a stop.
>> 4.0 to 2.8 is the normal full stop increase. Just my 2 cents.
>>
>> Jim Nichols
>> Tullahoma, TN USA
>> ----- Original Message -----
>> From: "Lawrence Zeitlin" <lrzeitlin@optonline.net>
>> To: <lug@leica-users.org>
>> Cc: "Lawrence Zeitlin" <lrzeitlin@optonline.net>
>> Sent: Saturday, December 13, 2008 4:49 PM
>> Subject: [Leica] Re: Half stop!
>>
>>
>>>
>>> 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
>>>
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>>
>>>
>>
>>
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>
> 



Replies: Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] Re: Half stop!)
In reply to: Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] Re: Half stop!)