I am in the middle of building a 4" F/10 newtonian with my son. You can see the progress of the build here. As you can see I've built the tube out of wood in an octagonal shape. We've already manufactured the mirror cell and last night we cut the focuser hole. Now it's time to start thinking about the secondary.
Does anyone have a simple yet sturdy design for a DIY spider and secondary holder? I don't have any metal fab skills or equipment but am a capable carpenter.
Edit: internal dimension of the tube is about 5" square (because its an octagon).
Edited by matt_astro_tx, 25 October 2021 - 11:55 AM.