[imhimmelkommter (Michael Toms)]

Originally Posted by Wavytone

Hi Michael,

If those octagonal shapes become the aperture stop your stars will have 8 horrible spikes radiating from them, and images of jupiter/saturn will be rather awful.

To be effective the baffles must create a circular aperture - not octagonal.

Best way to do that is to make the baffles out of something thin - 1mm aircraft ply for example, with the hole accurately cut using router with a jig or template to make a smooth perfect circle. Then glue these against those octagonal balsa strips.

The other thing is several 1-piece baffles from material like aircraft ply will substantially strength your tube - looking at it, it appears (a) quite heavy and (b) any localised stress such as where it attached to the mount is likely to break the glued joints.

Thanks for advice.