[White Rabbit]

I hear the word binning thrown around a lot here and it occurred to me that I dont actually know what it means.

For instance.

"HaLRGB 60 90 40 60 50 all 10 minute subs, Ha and Luminance 1x1 binning, colour 2x2"

This was taken from the picture of the week from the welcome page.

While were about it, what does colour 2x2 mean.

Thanks