2" Adapter Extension

thingiverse

I designed a new adapter concept for my filter wheel initially, but I needed something simpler to test the idea first. So, it evolved into an extension instead. To secure it onto the camera or whatever is attached next, this design tightens evenly from all sides now. If your printer can handle it, increase the print angle so that there won't be any support material on the threads. It will save you a lot of trouble, especially with the inside threads of the cap.