Archived posting to the Leica Users Group, 2000/11/07

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Subject: [Leica] Automatic focusing with the iC enlarger
From: "Anderson, Ferrel E" <AndersonF@ria.army.mil>
Date: Tue, 7 Nov 2000 11:44:55 -0600

Since someone else is offering to send you the instructions for setting up the
autofocusing on the 1C, I will just add the following basic requirements for
achieving autofocus:

	1.  You must use a Leitz 50mm f4.5 Focotar, or an older 50mm Elmar
enlarging lens, or a 50mm Leica rangefinder lens, which 	     require
special adapters.  The common denominator is that the focal length has to be
precisely the Leica 50 mm focal length, 	     whatever that is, and the
50 mm Leica lenses l	 listed above all  have that.  I don't know what a Fotar
lens is, and if it is not a 	     "Focotar", and if is even listed as 50mm,
it probably won't work throughout the full focusing range.  Other brand 50mm
enlarging lenses won't work.

	2.  The Focotars require the extension tube to work properly.  I can't
remember the catalogue number.

	3.  The pin on the column has to be in the proper hole.  The upper
position is for use with a 25mm  thick easel - i.e., a Leitz 9x12
inch easel.  The larger (12x16 inches) Leitz easel is 30mm thick, and requires a
5mm spacer ring on top of the pin to achieve   	     the proper distance from
the easel.  IMPORTANT!!:  The spacer ring is also required on later Focomat 1C
enlargers if you 	     use the original Focotar with 	the writing on
the front of the aperture ring.  The later Focotar lenses have the writing on
the 	     side of the barrel.  The pin is placed in the bottom hole if you
are printing with the paper placed on the baseboard without an 	     easel.

Ferrel Anderson