Thanks Ving...their is many ways to remove the grain but whilst doing so you will lose detail in the nebula....I didn't take as many shots with the HA image...that is why their is more grain in HA then the coloured version...double the exposure were done for the colour.
I think that out cameras are disadvantaged with imaging in one colour (like H alpha) as only the red pixels are activated, the blue and green ones arent, so we are only getting roughly a 3rd of our sensors, where as a dedicated monochrome camera like a SBIG or Starlight Xpress one will deliver full sensor information no matter broad or narrowband imaging
True Scott but I like the price of a DSLR compared to a tiny chip CCD.
Something with a CCD chip size the size of a DSLR chip costs over $10000 5 times the price. so you would most definelty want the camera to perform well at that cost.
@ Narayan
