Helical Focuser adapter for 4.5" and 114mm Newtonian telescope
thingiverse
This adapter empowers users to swap out the subpar rack and pinion focuser provided with their telescope, opting instead for a budget-friendly helical focuser sourced from eBay. To locate an affordable helical focuser, conduct a search on eBay or AliExpress using keywords such as "SVbony Metal High Precision Double Helical Focuser for 1.25". It is worth noting that the travel distance of this helical focuser measures only 10mm, necessitating adjustments to the primary mirror in order to achieve optimal focus. This adapter was specifically designed with a Touptek GPCMOS-style bullet camera body in mind, which resides within the focuser. Its adaptability may also extend to eyepieces.
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