[The_bluester (Paul)]

Originally Posted by xelasnave

Thanks Paul.

I am getting rather serious and learning everything I can and although you suggest a particular method I will do a variety of tests if I ever get a run of decent clear sky and see how I can fit your system into my selected routine. I think the RASA may take a while to get a sensible work flow...

I have formed an initial impression that flats are most necessary whereas darks, given the cameras these days, is not as big an issue as it once was...dithering and many subs already has shown to me, at least to me, noise is usually not too bad..flats however I know will improve my images greatly.

Thanks again for everything.

Alex

Regards different methods. I have found some data sets quite tolerant of calibration with a master bias and master flat (Which itself is produced from flats calibrated with the same master bias) but on others it led to brightened corners. Typically narrowband or LRGB images where I am trying to get away with the shortest subs I can, so the background is only just above the noise floor, master flat/master dark calibration proved better on some of those.

I have not found a data set of my own where calibrating with a master dark and master flat that that was calibrated with a master bias is worse than using a master bias instead of master dark, so I just do everything that way now. But everyone is free to use whatever process gets them a result they are happy with, many ways to pluck that running chicken!