TECHSPEC® C-Mount Fine Thread Focus Tubes are used for precision positioning of an optic. These tubes feature a 30mm diameter outer barrel with male thread at the base end, which has a secondary finely threaded interior barrel to allow for fine focusing. The secondary barrel has a female thread, knurled ring at the front end, and threaded interior for light baffle. Set screws can be used to fix the position. TECHSPEC® C-Mount Fine Thread Focus Tubes are available in lengths ranging from 20mm to 90mm.
Note: Compatible allen wrench (#56-271) sold separately.