Rif: Re: Strange Leica numbers...
- From: "GiorgioF" <fergio@xxxxxxxx>
- To: <leica@xxxxxxxxxxxxx>
- Date: Mon, 30 Apr 2007 12:51:30 +0200 (ora legale Europa occidentale)
Many thanks, Doug.
Sorry for the late reply, but I'm not able to see my messages. So, I've
thinked that my question was lost in cyberspace............... :-)
Giorgio - Italy
-------Messaggio originale-------
Da: Doug Herr
Data: 29/04/2007 21.14.17
A: leica@xxxxxxxxxxxxx
Oggetto: Re: Strange Leica numbers...
On Apr 29, 2007, at 9:25 AM, GiorgioF wrote:
> Gentlemen,
> I've a question for you. Some Leica M and R lenses have a number
> engraved
> onto the focusing scale (00, 16, 22, 55 and so on), after the m/ft
> symbol.
>
> Which is the meaning of these numbers? Can you help me?
It's the deviation of actual focal length from nominal. The
deviation is common among all manufacturers, Leitz was unique in
telling us what the deviation is. 00 is obviously no deviation, 16
is 1.6mm longer (i.e., a "50mm" marked 16 is actually 51.5mm).
Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com
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