Hi
This is of Sh2-155 (Cave Nebula) in the wavelength ordered palette (HST) and was taken with a FSQ106ED at f5 on a Paramount ME, the camera was a FLI ML8300 with exposures of 8x30 minutes SII, 12x30 minutes Ha and 10x30 minutes OIII. The Ha version can be seen on the home page of my website
http://www.imagingtheheavens.co.uk
There is a full size version at the following link
http://www.pbase.com/imaging_the_hea...43339/original
There are a lot of interesting subjects in the Sharpless catalogue so I may continue looking through them
Thanks for looking
Best wishes
Gordon