Focomat 1c questions.

Loren Sattler

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Hilo said:
Loren, what do you mean when you say this? Leitz did not make an anti newton condenser for the Focomat Ic. They made a seperate AN glass that we can slide over the bottom of the Ic condenser.
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Hilo, I am not home for a few days to take a closer look. I have it in my mind that I have AN glass but not sure about any details. I do occasionally get Newton rings. Will check later and update.
 

Loren Sattler

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Here are photos of my AN glass. The holder slips on to the condenser. As mentioned above, I still fight Newton rings occasionally with this setup. I will try the masking idea mentioned above.

Perhaps someone can offer a solution to my photos posting sideways? I took these with an iPhone and uploaded them to Photrio with a MacBook Air. They appear correctly on the phone and computer.
 

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Hilo

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Loren Sattler said:
Here are photos of my AN glass. The holder slips on to the condenser. As mentioned above, I still fight Newton rings occasionally with this setup. I will try the masking idea mentioned above.
Click to expand...

Your AN glass looks okay to me, but I can't see if there's any damage on the lower surface. If not, it should work fine.

Is there a lot of humidity where you are, or when you do not use your enlarger, is it cold in the room where you keep it? Turning on a heater just before using a darkroom can lead to Newton rings. I had a friend in Cairns, Australia where it can be extremely humid. He had lots of problems with Newton rings and, if I remember well, the self-made masks were the solution.
 

Loren Sattler

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Hilo, my AN glass looks fine. I live in the US in the midwest. There is a fair amount of humidity during parts of the year, but I do not believe that is the problem especially since I do most of my printing during winter months in a heated room. The enlarger is stored at room temperature. I have not done much printing lately. When I get back into it I will make a mask and try that when newton rings show up.
 

Don_ih

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Tmax films can be especially prone to Newton rings. The secondary mask should work in every instance.
 
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