Archived posting to the Leica Users Group, 2000/03/06
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Purple haze? I think all you guys were smoking something to have spent
several dozen e-mails debating the number of angels who can dance on an
f-stop.
Jim
- ----- Original Message -----
From: B. D. Colen <bdcolen@earthlink.net>
To: <leica-users@mejac.palo-alto.ca.us>
Sent: Monday, March 06, 2000 4:08 PM
Subject: RE: [Leica] Re: 50mm f1.5 Nokton question
> Thanks, David - I've learned far more today about f stop calculation than
I
> ever wanted to learn...:-) But I sure am glad to hear you found your
Hendrix
> album..!
>
> B. D.
>
> -----Original Message-----
> From: owner-leica-users@mejac.palo-alto.ca.us
> [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of
> drodgers@nextlink.com
> Sent: Tuesday, March 07, 2000 1:54 AM
> To: leica-users@mejac.palo-alto.ca.us
> Subject: [Leica] Re: 50mm f1.5 Nokton question
>
>
>
> B. D.
>
> >>I'm curious...How does one calculate these "stop fractions?"<<
>
> I'm sure that someone has already answered this, but f-stops are based on
> natural logrithms. You can use a scientific calculator, a spreadsheet like
> Excel, or you can even look up the codes in the tables of an old algebra
> book.
>
> If you really want to go retro, you can borrow my slide rule. I just ran
> across it the other day. It brought back memories of not that long ago. I
> found it in a box with my Hendrix ("Purple Haze") album and my High School
> Diploma.
>
> David.
>
>
>
>
>