Dark Clear Skies Extension Tubes
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Published
2025/12/15
About
The Dark Clear Skies Extension Tubes collection includes precision-machined spacers designed to adjust optical path length and achieve correct back focus in astrophotography imaging trains. Extension tubes are an essential component when pairing telescopes with reducers, flatteners, filter wheels, and cameras that require exact spacing for optimal performance. Available in a range of thread standards and lengths, these extension tubes provide rigid, repeatable spacing while maintaining precise optical alignment and minimising flexure.