Jam nut or flange mount for Aero - Ektar f/2.5 7 inch lens ?
Is there such a thing?
My wife found this lens in our Pile of Forgotten storage. I'm sure there are at least one or two more in there, but this one is so clean I'm motivated to ask so maybe I will try it.
The best I can measure is that the thread diameter is 77.3mm (3" ?) I am not an engineer. That's as close as I can measure.
So is there a common flange or jam nut for this monster?
TIA
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