Orion 2" Anodized Machined Aluminum Extension Tube

The Orion 2" Anodized Machined Aluminum Extension Tube provides extra focuser "back travel" sometimes needed to achieve focus with certain eyepiece/telescope combinations. More back travel is often needed for short-range terrestrial viewing or with use of a field flattener, coma corrector or focal reducer lens. It adds 2" of length extension and has two locking thumbscrews and is threaded for filters.