The #19838 adapter converts the larger 3.29-inch rear cell thread on the back of Celestron's some 9.25', all 11" and 14" class SCT and EdgeHD OTA's to a male OPTEC-4300 dovetail standard. This adapter allows attachment of Optec's Gemini Focusing Rotator or TCF-Lynx3 Gen2 3-inch focuser.
- Celestron Classic 11" and 14" SCT telescopes,
- Celestron EdgeHD 9.25" SCT telescope,
- Celestron C1100 EdgeHD 11" SCT telescope,
- Celestron C1400 EdgeHD 14" SCT telescope,
- Gemini Focusing Rotator,
- TCF-Lynx3 Gen2 Focuser,
- Any OPTEC-4300 receiver adapter.
- Inside Diameter: 3.15" (80mm)
- Outside Diameter: 4.95" (125.6mm)
- Overall Height: 0.52" (13.2mm)
- Clear Aperture: 3.15" (80mm)
- Weight: 6.4 oz (180 g)
- Back-Focus Usage: -0.22" (-5.6mm)
Note that most SCT back-focus distance measurements are made from the TOP of the threads. Thus, some adapters can have a negative back-focus consumption or usage when the focuser actually rests below the top of the OTA threads.