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Posting a reply to: RE: Blue light filter for graphs

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Chemi

Posted 12/23/2016 10:58 AM (#843945 - in reply to #843930)
Subject: RE: Blue light filter for graphs

I don't know of anything specific for fish finders, but photographers use "minus blue" filters (like LA120 filters) to do this. These have a deep yellow color. Anything transparent that has a deep yellow color is doing the same thing: filtering out the blue light wavelengths.

You can buy large cheap gel filter (plastic film) sets like this for $10, and the yellow one would remove most if not all the blue if you placed it over the screen on your unit:

https://www.amazon.com/Neewer-Correction-4-Color-Filter-Including/dp...

I'm wondering why you need to do this, if it's not being too nosey...