This image is made up of 18 exposures, two lots of nine taken on two different nights while this region was close to the zenith to minimise the effects of light pollution.
Details
Canon 5DH, Canon 300mm F2.8L at F2.8, Hutech LPR filter, 18X10min at an ISO of 200, in camera noise reduction on. Processed with flats in ImagesPlus stacked with Registar and adjusted levels and curves in PS. Also a bit of R&L 5x5 for ten cycles.
This would be much better from a dark site. As the LPR filter blocks some of the blue from the reflection nebula.
1.4MB
http://members.optusnet.com.au/~trlee8/RHO_m.jpg
Here is a version only digitally developed in IP and used GradientXterminator no levels or curves in PS
1.0MB
http://members.optusnet.com.au/~trlee8/RHO_75.jpg
Bert