Manual Filter wheel (eg. SVBony SV133) light leak blocker

Light leak blocker for low cost, 5-position, 1.25", manual filter wheels
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updated September 23, 2024

Description

PDF

The SV133 is a low cost manual filter wheel that suffers from some unfortunate light leaks through the control wheel. Other brands (eg. Astromania) also offer nearly identical models that would probably fit as well.

This cover goes over the the control wheel to block light infiltration. It is sized to accommodate a 78mm diameter ZWO camera in the back, with a 46mm diameter M42 extension tube on the front.

Print Settings

Printer : Creality Ender 3

Rafts: No

Supports: Yes, under the overhang 2mm above the print bed. Bridging should take care of the top surface

Resolution: 0.2mm

Filament: Generic PLA+ or PETG


Notes:

Print with the curved cutout down. 

The nominal distance between faces inside the cover is 22.5mm. Increase or decrease the scale depending on ambient temperature, filament shrinkage, etc.

Post-Printing

Use something like velcro, rip-wrap, elastic cord, etc. to secure the cover to the filter wheel. Consider using some ¼" (6.25mm) foam weatherstrip inside to really seal up any last leaks.

 

Tags



Model origin

The author marked this model as their own original creation. Imported from Thingiverse.

License