Solar filter clip on mount for Skywatcher 6" Netwon Telescope

In preparation of the upcoming solar eclipse over Europe, I wanted to build a solar filter for my telescope. The cardboard versions felt pretty flimsy and didn't really appeal to me, so...

... I designed and printed a proper one! :-)

Required parts

• Suitable solar protection foil for telescopes / optical instruments (e.g. Baader AstroSolar®)

• 8x M4x12 screws with nuts and washers

How to install

1. Take safety precautions! Cover your finder scope too. Make sure that your solar filter foil is approved for this use case and in good condition. Never look directly into the sun without proper protection.

2. Print out both parts. Use a darker, non-transparent filament for the base ring.

3. Cut the Baader AstroSolar® (or any other suitable) foil to size. Leave small cutouts for the M4 screws.

4. Sandwich the foil in between the base ring and the bezel and align the screwholes. Try to avoid touching the foil to avoid fingerprints.

5. Insert the M4 screws from the bezel-side and add the washers and nuts from the other side.

6. Clip the filter to the front of your telescope. It should slide on easily and snap in with an audible click.

7. For removal, carefully bend up 3-4 clips, until one side of the filter assembly slides over the rim of the telescope tube. Hold it in place and carefully bend the clips on the other side until the filter mount pops off. Note: This process is a little difficult by desing, to prevent accidental detachments.

Recommended material and print settings

• PLA or PETG works just fine. Since this part will be exposed to a lot of sunlight, UV-resistant materials like ASA are a smart choice too.

• 100% infill

• In case you experience some warping, try a small brim

I would love some feedback if you printed this model - so please upload a picture of your makes!

Happy printing!