Polarized filters

nullroute

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Does anyone in this thread know where I can obtain some polarized filters that would work with K1S cameras?

I've had the cameras a while now and I'm reasonably happy with them but its pretty difficult to read license plates with the ridiculous amount of sun I get here not to mention the grid pattern my center speaker reflects into the windshield.

See example video, its not bad, but it could be better I think.
https://drive.google.com/file/d/0B-3Tr996MNNqRThlRWlUVDFiNFU/view?usp=sharing

For example, reading the license plate of the prius in the right lane doing her absolute best to be an asshole.
 

jokiin

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your video isn't ready so can't look just yet, adding a CPL will cut the reflection but it also adds to the effective f/stop of the lens which darkens things up and also will add motion blur when it's darker, anything you find is going to involve a bit of DIY, for the sake of experimenting I'd probably look at the filter used for the 0806 as a cheap solution https://www.amazon.com/gp/B00S737JNI the low bitrate of your camera might work against this as a solution but it's cheap enough to experiment with
 

moojuiceuk

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I've not long written up my install on the Dacia forum. I've fitted a CPL to the front camera and it makes a reasonable difference to the image quality. Have a read here: http://www.daciaforum.co.uk/forum/topic/9857-dash-cam-install/

If you scroll down the forum, I've shown how to couple a CPL to the front of the camera using an armoured cable gland shroud. Im sure there are plenty of other rubber tapered tube like things out there which would do just as well to hold the CPL in place.
 

Rajagra

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Has anyone tried out polarizing film? It's fairly cheap and should be fixable to just about any camera once cut to size.
I know it isn't a circular polarizer, but I'm not sure that matters so much any more. Circular polarizers became necessary for auto-exposure cameras because internally they reflected light on to the exposure sensors. Reflecting caused polarization. If the light was already polarized (by a filter) you could get a cross-polarization effect that messed up the reading.

Digital cameras (other than SLRs) just use the image sensor for the metering don't they? No reflecting = no need to 'de-polarize' light so no need for a circular polarizer.

I'd certainly be tempted to try it.
 
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