Brian the blacks are definitely not clipped. I always check for that. I pulled
it up and stretched it hard and I can’t really get much more out of it. I also
looked at an APOD of this galaxy and the arms don’t go out much more than mine,
if at all.
On Nov 8, 2018, at 3:31 PM, Brian Skiff <bas@xxxxxxxxxx> wrote:
On Thu, 2018-11-08 at 14:09 -0700, Albert Barr wrote:
This is 40 hours of Ha LRGB on M33 taken from my observatory in Benson with
an FSQ 106 and an FLI camera. The FOV is a little bigger but I cropped some
of it off.
Albert
What happens when you adjust the background so that the
sky is a medium-grey rather than (almost) black. In other words,
how far out does the galaxy actually go in your composite
image-set? It certainly does not end where your present
contrasty one shows it seeming to cut-off rather abruptly,
but is perhaps twice as large. With 40 hours of exposure,
you ought to be reaching to very low light levels, but it seems
that information is lost in this version.
\Brian
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