|
A great shot Robin.
A couple of the brighter stars are showing the small wells of the KAF8300 chip. Those few stars are overexposed and have a largish halo. Not very pronounced in this image but this shows up more noticeably in fast larger refractors.
For example if Mike used one of those chips on his AG12 it would really be a problem.
You may get better looking stars with 5 minute or 7.5 minute subs. I judge exposure length by the maximum before the brightest stars start to spill over. For my scopes that is about 5 minutes.
10 minutes is fine at F8 and long focal length but wide field and fast the small wells damage the bright stars first and generally speaking you will lose colour info as too many wells become saturated.
It probably is a low noise camera so there isn't much of an issue of stacking more. It makes tracking easier too.
Greg.
|