VIOFO CPL-600 Rear CPL Filter – RC420 & RTC420 Cameras

For the RC420 Rear and RTC420 Telephoto Cameras. The CPL-600 clips on without tools and cuts rear glare

Your rear camera is shooting through factory tint, often into low sun, and reflections stack up fast. That is why rear channels so often show shapes rather than plates in daylight. The CPL-600 removes that polarised light at the lens, and it clips on and off without tools, so you can pull it for a run of night driving and put it back for summer.

Trusted AU store: We're an authorised AU reseller, shipping from Melbourne within 24 hours^*. You get a 12-month warranty on this accessory, local technical support, and our 30-Day No-Worries returns.

Who This Isn't For: Order by your rear camera model, not your dash cam model. VIOFO lists this filter as compatible with the RC420 rear camera and RTC420 telephoto camera, which are the A329-generation modules. VIOFO's own product title also references the RC320 and RTC320 used on the A229 Plus and A229 Pro, but their compatibility block does not confirm those. If your rear camera is an RC320 or RTC320, message us before ordering and we'll confirm the fit. Standard A229, A139 and T130 rear cameras take the CPL-300, and the front lens takes the CPL-200.

DCG Score & Highlights

What We Love

• Tool-free clip-on and clip-off, so seasonal removal is genuinely easy
• Cuts the reflections thrown back by tinted rear glass and reflective interiors
• Multi-resistant coating that handles scratches, dust and everyday cleaning
• Covers both the rear camera and the telephoto module in one part
• Adds physical protection to a rear lens that is awkward to reach

What Could Be Better

• Rear cameras already receive less light than the front, and a CPL takes more away. Night rear footage will be darker.
• VIOFO's own listings for this filter name several different camera models and do not fully agree. If yours is not RC420 or RTC420, check with us first.
• Rotating it correctly is fiddly on a camera you cannot easily see from the driver's seat.

Why Rear Cameras Need a CPL More Than Front Ones

A front camera looks through clear glass at a fairly even scene. A rear camera looks through factory tint, sometimes a heated-element grid, and frequently straight into low morning or afternoon sun. Every one of those adds polarised reflection the sensor cannot separate out afterwards. Removing it optically does more for rear plate capture than any resolution upgrade will.

Top Benefits

• Readable rear plates: Cuts the glare that turns a following car's plate into a bright smear.
• Handles tinted glass: Reduces reflections bounced back by factory tint.
• Seasonal flexibility: Clips off without tools when you want the light back for winter.
• Covers telephoto too: Works on the RTC420 zoom module as well as the RC420 rear.
• Protects the lens: Cheaper and easier to replace than the rear camera.

Upgrade Your Rear Clarity Today

Add the VIOFO CPL-600 to your cart if your rear camera is an RC420 or RTC420, and message us first if you are unsure which module you have. Compare the range in our CPL filters collection. Ships from Melbourne within 24 hours^*, covered by our 30-Day No-Worries returns.

Last updated: August 2026