CPL Filter
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Where to buy
Link to my Store:
CPL Filter: https://shop.tlbb.ca/products/cpl-filter
Link to my Etsy Store:
CPL Filter: https://www.etsy.com/ca/listing/4325126381/cpl-filter
Link to RetroPilot Store:
CPL Filter: https://shop.retropilot.org/product/cpl-filter/
Product Description
CPL Filter Set for Comma 3 / Comma 3X
Reduce Glare. Improve Vision. Enhance Model Performance.
#Update: Please DO NOT use CPL filter if you have ceramic tint.
Upgrade your Comma 3 or Comma 3X with this custom CPL (Circular Polarizing Lens) filter set — designed to reduce windshield glare and interior reflections that can interfere with OpenPilot’s camera vision, especially during bright, sunny drives.
Key Features:
🔧 Perfect Fit – Custom-sized CPL filters for both cameras on your Comma 3 / 3X.
☀️ Minimize Reflections – Cut down windshield glare and dashboard reflections that can interfere with ML performance.
🔍 Tested with OpenPilot – Carefully tested to confirm: the CPL filters do not block any part of the image used by OpenPilot’s ML model.
🧲 Easy Installation – Comes with pre-applied VHB tape and alignment stickers. No additional tools needed.
What’s in the box:
2x CPL Filters (Main cam + Wide cam)
Pre-applied adhesive rings (VHB)
Alignment aid stickers
Why CPL Filters Matter for Comma Devices:
CPL (Circular Polarizing Lens) filters work by blocking polarized light—the kind often caused by reflections on glass surfaces like your windshield. These reflections can confuse vision-based systems like OpenPilot, especially when they obscure key features like lane lines or nearby vehicles.
By adding a CPL filter, you're giving your Comma device a cleaner, clearer view of the road ahead. This results in better model confidence, especially in high-sun or high-glare conditions.
Still Worried About View Obstruction?
We've done extensive testing.
In the image above, you’ll see:
🟩 Green box = the actual camera feed used by OpenPilot
🔴 Red circle = the view available after applying the CPL filter.
As shown, the area used by openpilot is completely unobstructed. You get the benefit of glare reduction without compromising vision or safety.
Compatibility:
✅ Comma 3
✅ Comma 3X (Might support other community devices)
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