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If this will help the situation in finding a 2nd hand 45 degree diagonal - I am simply looking for a 45' diagonal - irrespective of brand/manufacturer PROVIDED - it features a brass compression ring in the eyepiece coupling.
There are many models of 45' diagonal which feature a simple thumb screw but I want to avoid these models as I hate accidently marking my eyepieces.
Consequently, if you have ANY brand of 45 degree diagonal which features a compression ring and not simply a thumb-screw then I would be happy to buy it!
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