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2" threads
I have a couple of 2" diagonals one a prism type from University Optics, the other a Bintel mirror diagonal.
My question relates particularly to thread used for the eyepiece holders in this type of diagonal. The Bintel one is 50mm when measured with my verniers, the University prism measures 55.5mm. Are either of these thread standard? Just what is a T2 thread?
My reason for asking is that the University prism is excellent optically but awful mechanically. If I can replace the eyepiece holder with a compression ring type, then I may save the cost of buying and new Baader prism.
Are there any adaptors available for 55.5mm thread?
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