Astromaster 130 mask and solar filter holder
thingiverse
My Bahtinov fit very loosely over the front of my optical tube, so I designed this ring to hold it still. It also has a second set of holes on the side which are for a Baader solar filter. Fits directly and snugly over the aperture. I included the f3d file if you want to modify to fit other equipment. Printed without supports using PLA in about 3.5 hours.
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