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Many telescopes, like Schmidt-Cassegrains or Maksutovs, offer a rather coarse focus adjustment. This helical focuser offers a clearly more precise and comfortable focusing. Simply twist the knurled ring and achieve perfect focus with your telescope or telephoto lens. The camera does not rotate when adjusting, so image orientation is always maintained.
Simply screw the TS helical focuser onto the T2-thread of your telescope or use the optional push adapters for attaching the focuser to the 2" or 1.25" receptacle. The adapters can be found in the accessories section.
You can also thread the helical focuser to the T2 mount of your telephoto lens for precise focusing of eyepieces or compact cameras.