25.5mm Polarizing Lens Adapter for DUDUAUTO Dash Cam
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A simple snap-on/thread adapter that lets you mount a 25.5mm polarizing (CPL) lens onto a DUDUAUTO car dash camera, cutt
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If you own a DUDUAUTO dash camera and want to get rid of annoying windshield glare and reflections in your recordings, this adapter is for you.
This model adapts a standard 25.5mm polarizing (CPL) lens to fit directly onto the DUDUAUTO camera housing. I designed it after buying a cheap 25.5mm polarizer lens online, since there was no ready-made mount available for this specific camera model.
Why use a polarizer on a dash cam?
A polarizing filter reduces glare from the dashboard reflecting in the windshield, cuts reflections off wet roads, and generally improves footage clarity and contrast — especially useful in bright sunlight or when your dashboard is a lighter color.
Compatibility
Designed specifically for the DUDUAUTO dash camera lens housing
Fits standard 25.5mm polarizing filter lenses (like the one linked in the model notes — cheap and easy to find on AliExpress)
Print Settings
Layer height: 0.2 mm
Infill: 15–20% is plenty (small, low-stress part)
Supports: not required if oriented correctly (see recommended orientation in the files)
Brim recommended — the part has a relatively small contact area with the bed, so if you notice it lifting or detaching during printing, add a 3–5 mm brim to keep it anchored
Material: PETG or ABS recommended for better temperature resistance inside a car (PLA works too but can soften in a hot car during summer)
Assembly
Simply press/thread the adapter onto the camera lens housing, then attach your 25.5mm polarizing lens on top. No glue or extra hardware needed.
If you print this and it works well (or if you need a tweak for a slightly different DUDUAUTO model), let me know in the comments — happy to adjust the design.