Zeiss Triotar - how do you open this ?

[luisalegria]

I have a Zeiss Triotar 135/4 in Exakta mount.

The helical is completely stuck at infinity. There are no screws that I can see, maybe they are covered by the focus ring.

I tried injecting lighter fluid and WD-40 (light oil) into the mechanism from the back and in the edges of the focus ring, no luck so far.

The only thing I can do is unscrew the front lenses, but that doesn't get me to the helical.

So, my next step is to put it in a bath of lighter fluid.

Any ideas before I go this far ?
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work.

[Attila]

Unfortunately I also don't have any idea.
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[luisalegria]

Oh well, its gone in the bath.

I'm crossing my fingers.
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work.

[spystyle]

I have a copy of this lens that works great. The aperture turns as smooth as butter but the focus turns kinda hard...

I would like to see pics of opening this lens, maybe I could make the focus nice and smooth

[rick_oleson]

I've never worked on the Triotar; I have notes on some other CZJ lenses at http://rick_oleson.tripod.com/index-81.html , I don't know how similar their construction would be.
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