Hi,
I cut out some disc’s of plastic grating film and mounted them in little cardboard holders last night. So the system is now good to go. I’m hoping the weather will co-operate so I can get at least one spectrum (of anything…!).
I received an email from Derek with his first spectrum. Taken through this grating film and looking at his results, as with mine, either the meteor was very “blue” or the grating film has indeed better performance in the blue compared to the glass gratings I have used previously.
We’ll see…
cheers,
Bill.