It's been a while since I've put together a refractor, and I'm having trouble finding information on baffles. Can someone point me to a description of how to plan them? I had a document saved on an old computer, but even that is gone.
Also, one of the four scopes I'm making is a 4-inch f/4.5. Would baffles be worth having in such a short tube? Heck, for all I know, at least one might be more important in such a short tube than in a longer scope.
By the way, the other scopes I'm putting together are a 4-inch f/7.8, and two 90mm f/10s.
Last night, after spending much of yesterday making the tools needed to make the tube for the 4-inch f/4.5, I was able to cut and mill the tube. The material came from a chunk of 4-inch PVC sewer pipe ($5 at Menard's). I'm getting metal for the others, but this was a good fit for the cell I have.