Quote:
Originally Posted by N1
Slight tangent from this interesting thread but what did you find most limiting about the 294 Paul?
|
Finicky flat fielding would be my call. On very dark backgrounds they can to produce a coloured halo in the shape of what I believe is the cooler block, neither flats nor darks get rid of it. You usually have to stretch the data really hard to find it but once you are there, that is that.
Also on flats, you really need a flat panel, the timing circuitry changes between short and longer exposures which changes the noise profile, so you need flats of a consistent time and to use dark flats of matching time as the changing in noise profile at short exposures mean bias frames are no good with them. I use 5 second flats with that camera and matching 5 second dark flats at the same temperature.