Now that I'm back in the hobby, I'm considering making my own refractor tube assemblies again. In years gone by, I used anywhere from 3 to 7 baffles depending on the F ratio, difference between the objective diameter and tube I.D. and the chosen fully illuminated spot at the focal surface.
My specific question is based upon my past practice of using just the center baffle to set the illuminated field, while just using the others (which were slightly oversized relative to the light cone) to reduce stray light. This seemed to work quite well, but I'd like the world's collective wisdom on this approach as the internet was not around the last time I did this. 8)
"Don't sweat the petty things and don't pet the sweaty things" 8O