Focomat Ic: mounting AN-glass "NESOO" correctly

Ljós

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Hello all,

I have gladly and proudly taken possession of a very nice Focomat Ic, and I am happy as can be. NICE! The negative-handling is just superb, I can position negatives (even those at the end of a strip, which can be a PAIN with other enlargers) swiftly and precisely... and of course the autofocus is a boon.
(Even better: this Focomat Ic has been expertly tricked out with a colour-head (Dunco, via a Kienzle-adapter)... I can even switch the colour module for a VC-module further down the road, then I could set paper grades without adjusting exposure. The colour head has a stepless density mask which is good for up to two stops though, very convenient. The mechanical qualities of the Focomat plus the modern colour head, it is heaven :))

So, the first prints were phantastic, and without Newton rings... during later sessions, yep, Newton rings showed, and I sourced a NESOO anti-Newton glass with mount plus the corresponding distance ring. Here is my question:

On arrival I think the glass itself was mounted upside down, but I am not 100 percent sure. It would be great if you could help me out, since I cannot find a detailed description or manual anywhere:

Let's forget about the spacer ring for a moment, it is clear where it goes and what it does. So, the NESOO itself is comprised of three parts: the glass disk, the part that slips on the condensor, and a threaded ring which sandwiches the glass. The glass is angled at the rim, and my question is: do I fit the glass in such a way that, when all is mounted, the AN-glass protrudes a tiny bit? (That is what I think. Makes the most sense. But it arrived at my doorstep the other way round, with the smaller surface diameter upwards.)

Thanks in advance for your help!
Greetings, Ljós
 
Last edited:
Thomas, thank you very much!
Don't wanna go to the trouble of finding AN-glass and then mucking up the mounting :)
What I like about the three-part-construction: before I realized the sandwiching-ring can be screwed off I thought: gee, that's going to be tough to "slip" on so that the glass fith without air-space and parallel, since the "slip-on"-ring fit quite tightly.
But this way, one can mount the slip-on ring without fear of harming anything, clean the surfaces, and fasten the glass disk with the outer ring.

Did I mention I am in love with the Ic? Such a wonderful tool.

Greetings, Ljós
 
Update regarding the slip-on ring: I had "practiced" with an older Focomat (hard to tell the model, Ia? Ib?). Mounting on the Ic it turns out: the condenser of the old model is noticeably shorter, the are not interchangeable as is. And: the slip-on ring really does just slip on the Ic, perfect fit.

Greetings, Ljós
 
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