Noah Yuan-Vogel
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That is to be expected from an underexposed image from any camera. Also, when shooting in tungsten light you will have a noisier blue channel which will add noise to your image when properly balanced. This can be corrected with a blue 80A of 80B filter when shooting in tungsten light.
I've heard this before and I disagree, those filters will just deprive your green and red channels of light, making them noisier...
They are only useful in cases where your red or green channel is clipping under tungsten lights. These blue filters will cut red/green light, allowing you to open up and give your blue channel more light without clipping your red/green.
In low light situations where you are underexposing and cannot open up to let in more light, optical color correction filters will only cut more light and increase noise in your images.