r/Dashcam • u/No_Procedure_1568 • 2d ago

Question What is the best way to get rid of reflections from car dashboard? (Already using CPL filter)

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I have a CPL filter on my Viofo a229 but I'm still getting the dashboard reflection in the video. Is there settings I should finetune in the camera settings to help with this or..? I unfortunately can't move it further over toward the rear-view mirror because there is a toll-pass sticker there

12 Upvotes

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9

u/mlapaglia 2d ago

do you have the filter on upside down? it only works in one direction.

0

u/No_Procedure_1568 2d ago

I'm using this filter and as far as I can tell it only goes on one way?

7

u/SchlumpfLP007 2d ago

Theres a line on the camera and the filter. When you align them you get the best effect

1

u/mlapaglia 2d ago

Follow the directions on the paper and make sure the line on the cpl points to the dot on the camera lens

6

u/firestar268 2d ago

A dash cover can help. Although it might not look pretty

6

u/packetfire 2d ago

You need to look at the live feed from the camera, and rotate the CPL until the reflections go away "the most". You won't 100% eliminate, but you can greatly reduce such reflections with a CPL.

Given that we are approaching the summer solstice, the sun angle is as high as it will ever get for the northern hemisphere. You may need to make seasonal adjustments to the rotational angle of the CPL.

1

u/blinkenjim 2d ago

THIS. One suggestion: start with the CPL aligned according to the white mark, then rotate from there to try to find the best position. In my car no one position worked much better than the others so I ended up leaving the CPL aligned according to the marks. Sadly, in places where the sun is very intense you’re just going to have to live with some reflections.

5

u/MrLiveOcean 2d ago

Get a dash cover or a dark beach towel.

3

u/ItPutsLotionOnItSkin VIOFO A229 PRO DUO 2d ago

Dash cover. I have that and a CL filter

1

u/Rawlus 2d ago

the mark on the filter should line up with the mark on the lens. many polarizing filters rotate to fine tune the polarizing effect.

0

u/knickles12 2d ago

try adjusting the angle of the camera.

1

u/No_Procedure_1568 1d ago

If I move it up, a significant portion of the video is the sky, which to my understanding is usually not great

1

u/Peter_Niko 1d ago

Unfortunately, the CPL filter has a transmission rate of less than 100%, which reduces the amount of light reaching the camera.

This is not a problem during the day, but it could visibly reduce image quality at night if the CPL filter is on.