M48 female to M48 female extension / adapter /connector for Astrophotography

thingiverse

This is 10mm M48 x 0.75 female to M48 x 0.75 female connector, .step file is included so you are welcome to mod or even improve the model. I used it to connect my SW Coma Corrector to a M48 Variable Locking Extension Ring. I printed it in PETG as PLA is very sensitive to temperature changes. Please note, threads are really thin, so use it at your own risk. I printed the initial layer at 0.24 and the rest at 0.12mm with the "Draft shield" option enabled (Cura). I used the draft shield to get rid of any possible oozing on the threads. As printers are different and have different tolerances, the test ring is included, - use it to check if you need to adjust any horizontal expansion values on your slicer.