thanks folks.
Yes I did ISO 200 to keep noise as low as possible.
The HA filter does work well with the lens (as does the UHCS filter)
Heres is a labelled pic of the UHCS filtred RCW 103 area in Norma
http://scottalder.fotopic.net/p27959148.html
Hit the full size button for a full sized view (large download)
Theres so many of these obscure little nebula regions in the southern sky. I hope to re image this area with no moon soon.
Scott