Archived posting to the Leica Users Group, 2003/12/02

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
Subject: Re: [Leica] Formula for calculating f/stops
From: Henning Wulff <henningw@archiphoto.com>
Date: Tue, 2 Dec 2003 16:49:16 -0800
References: <67A1AA14-2523-11D8-9C53-003065D6E648@umich.edu>
 
At 6:58 PM -0500 12/2/03, Dante Stella wrote:
>Does someone have a quickie formula from going from % of light 
>transmitted to stops difference from 100%
>
>e.g., 50% transmission = -1 f/stop? (that's an easy one but you get the idea)
>
>Thanks!



Percentage = 100 x 2 exp(f) where f is the stop variation as per your example.

- -- 
    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com
- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html
In reply to: Message from Dante Stella <dante@umich.edu> ([Leica] Formula for calculating f/stops)