Voigtlander Ultron 35mm f/1.7 Reassembly

[igzabeher]

Hello. I'm wondering if anyone has, or can point me in the direction of instructions/diagrams for reassembling a Voigtlander Ultron 35mm f/1.7 screwmount lens? My lens developed the wooble which rapidly progressed to a separation of the mount and adapter from the body. Luckily this happened in a safe environment, so no damage was done and I managed to retain all of the screws, but something has gone amiss. Putting things back where I believe they belong, leaves me with a very limited focus range.

Yes, I could easily take it in to Nippon Photoclinic, or send it off the CameraQuest or some other such shop, but I don't have the money. Any assistance will be greatly appreciated. Thank you kindly.

 

[shutterfinger]

A Lens Collectors Vade Mecum makes mension of this lens but that's it. Other versions are mentioned a a Gauss type with one as a 9 group, 7 element design.
The Gsass diagrams are standard, wide angle, high speed.

And the Ultron as

but unknown what vintage it is for.
Light travels the direction of the arrow. The arrow also designates the aperture position in Voi041 and Q18, the | top and bottom in Q16 and Q17.

 

[John Koehrer]

Because the helical has separated the only way to do it is trial and error.
If your camera has a swing open back it's easier than a Barnack.

Swing open back? GOOD.
Shutter speed on T or B with the shutter locked open use tracing paper of several strips of frosted tape across the film gate. Not on the rails!
Install the mount section and then the front helical, check the image on your "ground glass" if it's still not right back the helical out
and use the next thread, try it again. Just keep going until everything looks OK. When you find the thread, you need to adjust focus;
it's just using a magnifier or loupe to check for sharp focus.. delicate adjustments to get it..

If you have a Barnack, you can either make a small bracket of some kind to hold the lens at the proper distance for infinity and in a darkend room use plain paper or mount board
behind it and the lens will project an image onto the board. AT that point it's the same trial & error as above.

OR! remove the mechanical section from the body shell to go through the first paragraph.

 

[igzabeher]

Thank you, gentlemen. I'll see what I can make happen.