Archived posting to the Leica Users Group, 1998/05/26

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Subject: Re: [Leica] Retrofocus. was sharpness discussion
From: Chris Bitmead <>
Date: Tue, 26 May 1998 13:56:39 +0000

Bryan Willman wrote:
> The real point here is that Retrofocus lens is
> physically longer than its focal length.  So,
> a 21mm for an M camera must be retrofocus,
> since you can't fit the nodal point within 21mm
> of the film plane.

What do you mean "can't" ? Do you mean you can't without
interfering with the metering?