Using my 3D Printer. I made a Spectrograph.

With my 3D printers. I was able to make the main body of the spectrograph that allowed me to install the slit, grate, and optics needed to have a fully functional Spectrograh for a little under $800 US. I have 2 versions of the grates. One for low-res (300 nm) and one for hi-res (2400 nm). The 300 grate is for my filter testing and the 2400 would be good for solar work. Overall, it was a fun project proving that I Won the filter lottery... ;-) Here is the link that got me going with the project: http://www.astrosurf.com/solex/sol-ex-presentation-en.html