Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope, or for astrophotographic applications
Adds 2" of extension, fits in 2" telescope focusers, and accepts 2" eyepieces or accessories
Features two locking thumbscrews to secure any inserted astronomy accessory
Threaded for use with 2" Orion eyepiece and astrophotography filters
Machined and anodized aluminum tube