Archived posting to the Leica Users Group, 1997/03/14

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Subject: Re: Lenses for CL
From: "Peter Jon White" <pjwhite@tiac.net>
Date: Fri, 14 Mar 1997 11:51:41 +0000
 
> Also, I've been told that the 90mm f4 lens that is intended for the CL is a 
> restricted f2.8 Elmarit, and close examination of the aperture blades seems to 
> confirm this.  Why would Leica have done this?  Someone suggested to me that 
> this is something to do with the limitations of the rangefinder, but other 
> than a lens physically blocking the rangefinder I can see that any lens could 
> be a problem.

Greetings,

The CL has a narrower rangefinder base than the M series cameras, 
which makes focusing less accurate. With the shallow depth of field 
you get with a 90mm lens at f:2.8 that inaccuracy would be a problem. 
Hence the f:4 lens.

Peter Jon White