Archived posting to the Leica Users Group, 2001/02/02

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Subject: Re: [Leica] How to realign Hektor 135/4.5 head/tube?
From: John Collier <jbcollier@home.com>
Date: Fri, 02 Feb 2001 21:56:36 -0700

Yes, you will need a ground glass focusing screen, focusing cloth, magnifier
and shim stock in various sizes. I would recommend the "Leica Camera Repair
Book" by Thomas Tomosy, not because it is a good book, it is only fair, but,
because it has a section on how to disassemble a Hektor lens. The infinity
focus is adjusted by a shim between vulcanite section and the focusing index
dot. I would test the lens at infinity (at least 3.5 km or 2 mi) and, if it
is off and not improved by moving the optical unit away from the film plane,
I would remove the present shim and make up progressively smaller shim packs
until things are right. If this seems like a great deal to much work, I
agree. I had mine collimated and CLAed for $100US and I paid the chap with a
song in my heart.

Cheers

John Collier

PS: After infinity is all worked out you will still probably have to adjust
the lenses focusing cam mechanism....not for the feint of heart.

> From: Andrew Moore <dmm@bronze.lcs.mit.edu>
> 
> I have a Hektor 135/4.5, in Leica screw mount, with a removable lens head.
> I've had excellent (understatement) results with it on the viso/bellows.
> I'm almost positive that the focusing tube and head aren't a matched set,
> and focus is in fact off by about 3 feet at a distance of 25 feet or so.
> 
> Does anyone know of a do-it-yourself method of bringing things back into
> alignment?  What needs tweaked, and how?  I'm not opposed to filing away
> bits of metal either.  I paid $80 for this at a swap meet for this
> beat-up, dusty and scratchy sample and it's more than paid for itself.
>