Archived posting to the Leica Users Group, 2005/03/11

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Subject: [Leica] RD-1 users: Light loss with fast lenses?
From: mail at (Steve Unsworth)
Date: Fri Mar 11 17:28:11 2005

Most zooms are slow, especially zooms starting at 12mm, and people seem
to want to buy zooms :-)

I have a Canon 300D with lenses from f1.8 (20mm) to f1.8 (50mm)


-----Original Message-----
[] On Behalf
Of Peter Klein
Sent: 11 March 2005 21:36
Subject: Re: [Leica] RD-1 users: Light loss with fast lenses?

Thanks, Henning and B.D.  I find it interesting that the fastest lenses 
specifically designed for DSLRs so far have been f/2, and most are 
slower.  Why?  Is it just marketing--they guys with spreadsheets have 
decided that "the public" wants mostly slow zooms, plus or two f/2 or
macros? Or are there some genuine technical reasons why lenses faster
f/2 are a problem for digital as things stand now?

In reply to: Message from pklein at (Peter Klein) ([Leica] RD-1 users: Light loss with fast lenses?)