Celestron RASA 8" ring and washer
thingiverse
Based on mxcoppell/apshooter inspiration on cloudynights.com To replace uneven and too thick "Black Teflon Compression Ring" provided by Celestron for Rasa 8" telescope. Three models: Latest is rasaring2: used PETG and my printer like a slightly larger size, and removed the washer part to just get a full metal on metal connection rasaring2: 85.6mm inner diameter, outer 87.4mm, 2.3mm heigh rasaring -> 87.5mm outer, 85.4mm inner diameter, 2.3mm height. Fits within retaining ring. No washer, so metal of rasa-T-ring adapter will hit metal of Clamp Ring. rasaring-washer -> 87.5mm outer, 85mm inner diameter ring, w/ 2.3mm height washer/bearing: 87.5mm outer and 81mm inner diameter, w/ 0.6mm height. This goes between rasa T-ring adapter and Starizona filter slider to allow filters to slide out without hitting Clamp Ring. Height of washer does not affect backfocus.
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