Filter wheel for 40.5mm filters (4 slots)
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I had some 40.5mm photography filters lying around. Wanted to design a filter wheel around it for my telescope + camera
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- Physics & Astronomy
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I created a filter wheel for four 40.5mm filters to attach between my camera and telescope (1.25" eyepiece). It's far from perfect but it works. Using magnets the wheel stays in the chosen position. I used a simple thread so the parts can be assembled later and it can be printed without supports, the pieces that are connected by threads are are meant to be glued together to make it strong enough. Surely this can be improved. Added benefit is people remixing could adapt the camera connector to suit their camera.
BOM:
- 5x magnet (10 or 15mm diameter, 1.5mm height) glued in place
- 1x M4x16mm hex socket head screw + matching lock nut – don't tighten too tightly. This is the axle of the wheel.
- I used 2x washer to compensate for the slightly too long screw length and to reduce friction.
Print settings:
- I have a 0.6mm nozzle. 2-3 walls.
- Printed in PLA, lower layer height is better. I used 0.18 because of the threads.
- If you use the right print orientaton no supports are needed
If I would change anything it would be to add 3 screws to connect the bottom and top shell in a more secure way, currently it's just the axle that does this (which is why I added 2 small pieces of tape).
Sadly I didn't take the time to make this parametric but it seems there are plenty of other filter wheel solutions out there for other filter sizes/numbers.