SeeStar S50 2 Inch filer holder

This model consists of several parts.

• A bottom that is to be put on your SeeStar S50. (Needs to be printed with supports)
• A Top that contains your filter.
• A spacer that can be used when you filter is thicker. 
• Robust bottom and top cap to protect your filter when you are done observing.

Notes: 

• The SeeStar S50 side is a lose fit. This is intended so the holder drops off the S50 if it wants to auto shut down and you have forgotten it is still on it. And the plastic may damage the S50 so I prefer you use some tape or 1 mm thick felt to make it tighter.
• It is held together with M3x6 mm bolts. Use one or multiple spacers provider in the model to meet you filter thickness.
• Make sure you don't damage your filter with 3D printed parts that still have sharp edges.
• Print it in black, I tested on PETG/NGEN and ABS 0.3 mm height.

S50 holder (new experimental)

The idea is when you have multiple filters you can easy swap filters because it is magnetic attached. Make sure that all magnets North points the same way. Even when you rotate the filer in 90 degrees.

• S50 magnet holder 2x1 mm magnets rev3 has been modified so you can put 2x1 mm thick magnets (1 side for the holder and one side to stick on the S50).
• Example is 8x1 mm magnets, I used 2 pairs on each side.
• It seems to be thin enough so the S50 can be folded with it, but don't take my word on it! Use it with care.

Dew cap holder (experimental)

• The filter turned out to get dew on when imaging at -3C. Both sides even when the S50 had it's dew heater on. 
• I ordered a 300 mm lens warmer, and created the dew cap + dew cap cover for it.
  I think you may want to print this in ABS.
• Dew cap appears to work great tested in very bad moist -3C conditions.
• NOTE: I have no idea if the filter you use can resist the heat or not, so be careful!

I created it for myself, but I am not selling, 3D printing,…. It is up to you guys to take it, modified it, improve, 3D print it and sell it. 

First good test result

Finally got a good night and use the Antlia Quad band filter on my model for 40 minutes on, M1 Crab nebula. The stars in the S50 appears to be cross hairs and I think it is because how the stepper motors drive.

I did use Astro Pixel Processor with the SeeStar generated FITS to create the end result.
No halos appear to be visible.

Second result

Rosetta nebula 60 minute with Antlia Quad band filter. Bortle 9 sky with full moon. 

This time with the complete model including magnets, dew cap heater,… so the S50 has no issues with the tracking.

I did use Astro Pixel Processor with the SeeStar generated FITS to create the end result.

The image is slightly enhanced but real colors through the filter. 

Antlia Ha+OIII dual filter

I did not have good clear sky but the S50 appears to have issues not to have enough stars to stack images. 

Maybe when I have better skies I try again.