Fits in 2 inch telescope focusers and accepts 2 inch eyepieces or accessories; threaded for use with standand 2-Inch astrophotography filters
Features two locking thumbscrews to secure any inserted astronomy accessory; with a brass compression insh to prevent the marring of your telescope accessories
Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope; or for astrophotographic applications
Male thread - M48X0.75; Female thread - M48X0.75; eliminates a range of focusing problems
The extension tube has a M48X0.75 interior thread and a M48X0.75 exterior thread for elegantly solving spacing problems in astrophotography