Spacer and Dust Cover for Energy Rejection FIlter

thingiverse

I had a 100mm F12 scope, but I wanted to use it on my Williams Optics ED80 telescope instead. To make this work, I needed a spacer that would allow me to utilize the original cell holding the energy rejection filter (ERF). The spacer also serves as a dust cover for the ERF. If you'd like to modify the design, I've included a sketch-up file - it's extremely straightforward.