Taking flats -spectral response

[Merlin66]

Just a question...

We normally take flats to correct for dust bunnies, vignetting etc.

If we use an LED panel then the light is anything but constant across the spectrum, also when using a light source the spectral distribution will follow the temperature Planck curve and have higher intensity towards the red/IR.

What impact would/ does such a skewed intensity curve have on the images being produced???

[wimvb]

For nb or lrgb imaging, you can correct for this by adjusting the exposure time.

You can’t do this with osc, where it will cause a colour cast. Unless you use a colour light source, that colour cast is about all that will happen.