Archived posting to the Leica Users Group, 2001/03/15

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Re: Using Viewfinders and Effective Base Length of Leica III
From: Marc James Small <msmall@roanoke.infi.net>
Date: Thu, 15 Mar 2001 10:25:37 -0500
References: <200103141842.KAA11470@mejac.palo-alto.ca.us>

At 09:56 PM 3/15/2001 +0800, Cummer Family wrote:

>I think it interesting the Bessa T rangefinder is 1.5 times magnification -
>just like the rangefinders on the old Leica LTMs going all the way back to
>the Leica III of 1933. I have a question - what was the rangefinder length
>of the LTM Leicas with built in rangefinders of 1.5X magnification? Stephen
>Gandy points out that the Bessa T has a rangefinder effective base length
>of 58mm and I wonder how that compares with old LTM Leicas. I have searched
>Laney's Leica Collectors Guide but he seems silent on the rangefinder
>length of the old LTMs.

I suspect that this chart will come out garbled a bit, but here goes:

early Contax I	    103mm	        0.9X?		92.7mm?
later Contax I	      93mm	        0.9X?		83.7mm?       
Contax II/III	      93mm	        0.75X		69.75mm
Contax IIa/IIIa 	      73mm	        0.66X		48.18mm
Leica II		      38mm	        1.0X		38mm
Leica III - IIIg	      38mm	        1.5X		57mm	          
Leica IV	      60mm	        0.9X		54mm
Leica M3	      69.25mm	        0.92X		63.71mm
Leica M2/M4/M6	69.25mm	0.72X		49.86mm		
Leica M6J & M6HM	69.25mm	0.85X		58.86mm
Kodak Ektra	    105mm		?		    ?
Kodak Retina RF	     ?		?		    ?
Voigtländer Prominent   40mm?	0.55X?		22mm?

Marc

msmall@roanoke.infi.net  FAX:  +540/343-7315
Cha robh bas fir gun ghras fir!