Archived posting to the Leica Users Group, 2004/01/25

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Subject: Re: [Leica] how much is a 6.8 opening?
From: Eric Welch <eric@jphotog.com>
Date: Sun, 25 Jan 2004 07:33:56 -0800
References: <000001c3e34e$0ec4f950$6401a8c0@dorysrusp4> <010101c3e352$67739f80$388a8418@symkeehx5nw8g8>

I believe it's a third stop. And in fact, for example, in the 400 telyt 
6.8, because it has only a two air-to-glass surfaces, that it was more 
like a 5.6 lens in effect, if not in reality.

Eric Welch
Carlsbad, CA
http://www.jphotog.com

"A lie can travel halfway around the world while the truth is still 
putting on its shoes."
- -- Samuel Clemens (Mark Twain) 
On Jan 25, 2004, at 6:49 AM, animal wrote:

> Is it half a stop between 5.6 and 8?
> Thanks
> simon jessurun
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In reply to: Message from "Don Dory" <dorysrus@mindspring.com> ([Leica] Don's PAW 4:Sophie contained)
Message from "animal" <s.jessurun95@chello.nl> ([Leica] how much is a 6.8 opening?)