Jupiter-3 loose head

[edftwin]

Hi, i've just received my J3 and i realized that the head is a bit loose. It wiggles a bit when i turn the focus ring and aperture.

Is there any way to tighten it?

Any help will be appreciated, thanks !

Best regards,
Edwin.

 

[Mr_Flibble]

Not sure if it is true for both the LTM and Contax mount J3s, but is the front end (lens unit and aperture ring) screwed in tight? Do the aperture indicators line up correctly with the dot on the mount?

 

[edftwin]

Not sure if it is true for both the LTM and Contax mount J3s, but is the front end (lens unit and aperture ring) screwed in tight? Do the aperture indicators line up correctly with the dot on the mount?

Sorry, i just figured out that it is the rear end that is loose...The biggest aperture f1.5 and smallest aperture f22 match the dot correctly.

 

[Sonnar Brian]

The rear-end, Optics Module or the Focus mount?

The rear optics simply screw in on most with SN under 63xxxx.

If the focus mount, take off the focus ring. More set screws are under it that hold the helical into the mount. Those are usually the problem.