I agree. Even if they were odd f/stops they would be going up the scale be 1.41x for the next higher stop. Maybe it depth of field at different f stops?????
Odd if its F stops since they are not equa-distance. What would be the reason to have a non linear aperture?
-----Original Message-----
From: Randy Little <randyslittle@xxxxxxxxx>
To: PhotoForum educational network <photoforum@xxxxxxxxxxxxx>
Sent: Fri, Oct 9, 2015 11:23 am
Subject: Re: Aperture markings on vintage lens question
From: Randy Little <randyslittle@xxxxxxxxx>
To: PhotoForum educational network <photoforum@xxxxxxxxxxxxx>
Sent: Fri, Oct 9, 2015 11:23 am
Subject: Re: Aperture markings on vintage lens question
Odd if its F stops since they are not equa-distance. What would be the reason to have a non linear aperture?
On Fri, Oct 9, 2015 at 10:40 AM, Lea Murphy <lea@xxxxxxxxxxxxx> wrote:
Guessing…could they be related to EV numbers? Or something to do with Cine?
Lea
your kids . my camera . we'll click
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On Oct 9, 2015, at 9:27 AM, Jan Faul <jan@xxxxxxxxxxx> wrote:
They’re f-stops. Not all manufacturers agreed to our usual numbering system today. I have a Leitz lens which begins with f2.2 and goes up to f19
On Oct 9, 2015, at 10:10 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 systemis non-conventional at least to me. They double in value from step to step as onewould expect f numbers to allow double the amount of light to pass but I don’tremember having seen this particular sequence.
<2015-gunther-lens-1.jpg>
Andy
Art Faul
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