Slains Castle

by pakman

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In most cases, we use a T-ring (42mm or 48mm) that is camera-brand-specific to connect to either a) the threads of the focuser tube, if it comes with threads or b) a generic standard size "T-adapter" which has male screw threads on one side that fit the T-ring female threads, and a "nosecone" on the other that slips into a focuser tube without screw ...

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