Anthony Ayiomamitis wrote:
Dear Friends,

Finally a small break in the bad weather we have been experiencing the
past few weeks with a brief 3.5-hr window of opportunity after the moon
had finally set to image the Crab Nebula in Taurus. I regret not
pursuing the luminance portion in h-alpha (live and learn) and I will
follow-up with a repeat visit which will most certainly include a heavy
h-alpha component.

For those interested, please see
http://www.perseus.gr/Astro-DSO-NGC-1952.htm .... the higher resolution
version available by clicking on the hyperlinked image includes a
"misplaced" asteroid on the upper left quadrant.

The seeing was quite horrible (FWHM 2.9 to 3.6 arc-secs) and a far cry
from my usual 1.7 to 2.3 arc-secs.


I would avoid going h-halfa for a luminance but then it is up to each
individual. As for the picture the colour balance isn't the best, the
central portion is a bit too bright (hence hiding the details within) ,
it is pretty noisy and the background is too dark (except for a faint
reddish halo around the central portion of the image). Were I you I
would go for a stright 3-hours luminance followed by the canonical rgb
in binned mode.

Andrea T.