Re: Aperture markings on vintage lens question

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Its a rodenstock lens and they are apertures I found a rodenstock manual. 
Eurynar era. 

On Oct 9, 2015 2:43 PM, "Don Roberts" <don.roberts@xxxxxxxxxxxxxxx> wrote:
Waterhouse Stops?
Don


On 10/9/15 9:17 AM, Herschel Mair wrote:

Looks like reciprocals of sorts... 1/6... 1/12... of something...

On Oct 9, 2015 8:11 AM, "Andrew Davidhazy" <andpph@xxxxxxx> wrote:
Somebody asked me what the markings on this lens meant - suggestions? 

Presumably they are f stops or light volume designations but the numbering system
is non-conventional at least to me. They double in value from step to step as one 
would expect f numbers to allow double the amount of light to pass but I don’t 
remember having seen this particular sequence. 


Andy


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