AW: [Leica] M2 rangefinder adjustment

[Michael Dienert <MDienert@foq.de>]

> -----Ursprüngliche Nachricht-----
> Von:	Martin Howard [SMTP:marho@ikp.liu.se]
> Gesendet am:	Mittwoch, 2. Juni 1999 13:00
> An:	Leica User Group
> Betreff:	[Leica] M2 rangefinder adjustment
> 
> 
> The rangefinder on my M2 needs adjustment: Images do not align at
> infinity (yes, I'm looking at things several miles off).
> 
> Can I adjust this myself?  If so, how do I go about it?  (Leica
> Answers
> page was down/unreachable).
> 
> 
> M.
> 
> -- 
> Martin Howard, Grad. Schl. for Human-Machine Interaction,  |
> HMI/IKP, Linkoping University, SE-581 83 Linkoping, Sweden.|    Just
> Tel: +46 13 28 5741; Fax: +46 28 2579; ICQ: 354739         | say
> "DOOH"
> E-mail: marho@ikp.liu.se; www.iav.ikp.liu.se/staff/marho/
> +------------
> [Michael Dienert]  
> 
> hi martin,
> 
> below please find the answer to the same question, edomond once asked.
> this trimming procedure adjusts horizontal alignment only. i do not
> know how vertical alignment is adjusted. if anyone knows i'd
> appreciate any hints.
> 
> michael
> 
> hello edmond,
> 
> be careful, the trimming screw is NOT inside the camera!! if you take
> off the lens, you can see a small metal wheel at the end of a lever.
> this wheel juts out the plane of the lens bayonet. if you look through
> the finder you can see the the bright window of the rangefinder move
> if you press and release the wheel with your finger.
> 
> the screw you must turn to adjust the rangefinder is the screw through
> the axis of that wheel. by turning it you change the distance of the
> highest (when the camera is laying on the back side) point of the
> wheel (the point which touches the lens' cam) to the mounting plane.
> 
> the trimming procedure is as follows:
> 
> point your camera (summicron attached) to a vertical object far away
> (tree, antenna mast etc). set the lens to infinity and check if you
> have alignment. if not, take off the lens, turn the eccentric screw
> and check the alignment again. repeat this procedure until you have
> perfect alignment at infinity.
> 
> it shouldn't be necessary to repeat this procedure. i did it only
> once. i also have that 40mm summicron-c. it uses a different approach
> of the rangefinder cam (it's a steep cam where the other lenses use a
> second helical drive). on my m3 i see a little misalignment with the
> 40mm compared to the other leica lenses (eg. 50mm summicron) which are
> perfectly aligned. maybe it's caused by the different cam. but i think
> the difference is neglectible. if you have another lens with the more
> sophisticated helical driven cam you should use that to adjust the
> rangefinder. if you only have the summicron-c you can of course trim
> the rangefinder to perfect alignment with this lens.
> 
> i really like the summicron-c. it's the lens i take most of my
> pictures with (mostly attached to a leica-cl).
> 
> btw the 35mm summaron for the m3 uses the same steep cam approach as
> the summicron-c.
> 
> if you have further questions, just send me an e-mail.
> 
> best regards
> 
> michael
>