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Orion Extension Tubes for Telescope Focusers
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  • Versatile extension adapters for telescope eyepieces and accessories that require additional focuser back travel
  • Extension is often needed to achieve focus during short-range terrestrial viewing, or for astrophotography applications
  • Adds 2" of extension, available in 1.25" and 2" sizes
  • Features two locking thumbscrews to secure any inserted accessory in-place
  • Machined and anodized aluminum tubes are threaded for use with properly sized Orion filters

These anodized, machined aluminum 1.25" and 2" Orion Eyepiece Extension Tubes provide 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. We offer 1.25" and 2" models, which fit 1.25" eyepieces and 2" eyepieces, respectively. Each adds 2" of length extension. Each also has two locking thumbscrews and is threaded for filters.