Interference Eliminator T-Adapter

thingiverse

One of the most noticeable things with my first solar attempt that was pointed out to me by the helpful people on the solar forums was the classic Newtons Rings showing up in all their glory. In reading about these I read one of the best ways to get rid of them would be to install a Interference Eliminator T-Adapter. Well, these components are fairly expensive for something so simple looking that I just cannot get myself to fork that out for something I could make myself. So today I fired up my Solidworks program and designed up an adapter in which I made 6 versions at different angles from 0 to 5 degrees of offset. These adapters also have 42mm threads in both ends (I have a male-to-male adapter ring already). Once the design was completed, I sent it to my 3D printer for fabrication. The result as you see fits perfect and I was able to pull on the male-to-male adapter ring as hard as I could (before mounting to the scope of course) and it does not strip out the threads. This was way more force than the weight of my ASI camera so absolutely no worries of it falling off. I will start with 1-degree and worked my way up till the rings disappeared. Since these rings show up differently depending on what camera is being used, I went and created a model at these various offsets. They are cheap and quick to print out so it will be necessary to try the different angles out on your particular camera to find the correct adapter for you to use. NOTE!!----Please make sure you screw in an adapter ring into the threads on these 3D printed adapters to smooth out and clean up the threads so they screw in nice and smooth. Also make sure you pull on the adapter to make sure it does not pull off of the threads. If it does, you can just try scaling the part now by 1 percent and trying it again. Every printer has its own tolerances. Theses adapters were done on my Ultimaker 3. I also went and painted the inside with black paint for added light blocking.