the Rosette is getting pretty low in the sky for imaging. I got started on
this one late in the season and I have run out of opportunity to get more
exposure in it for this season.
So here it is 12.5 hours of Ha and [OIII] from an AP155EDF f/7 and an FLI
PL39000M.
http://www.narrowbandimaging.com/ngc..._hao3_page.htm
be sure to look at the full resolution version
The key challenges in processing were fixing the bad columns and trading off
overall brightness with tolerable graininess.
Although the QE is low it is a lot of fun using this sensor. Based on the
PTC analysis I did the only thing I can see that causes this sensor to be an
eng grade are the bad columns. It seems to work pretty darned well if you
have time to spend on the object.