Celestron RASA 8 Telescope Aperture Mask
thingiverse
This is an aperture mask for Celestron RASA 8 telescope. It appears that a batch of RASA 8 scopes produced in 2021 have a problem. The primary mirrors reflect light from part of the edge as shown in the photo. The aperture mask stops down the scope by 4 mm and prevents light from falling on the reflective edge. Note the before and after images. I printed this using black PETG filament. If the finished part has a shiny surface, sand it with fine sand paper for a matte finish.
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