I didnt realise the 1.2 metre UK Schmidt scope at Siding Spring had done this. Its a fantastic piece of work, using the worlds biggest monolithic narrowband H Alpha filter and Tech Pan film (the finest film ever made for Ha imaging).
The telescope
http://www.aao.gov.au/ukst/
the Ha survey
http://www-wfau.roe.ac.uk/sss/halpha/index.html
one can download Gif or Fits images.
Go here
http://www-wfau.roe.ac.uk/~sss/scan_...s/hal_map.html
if you click a black square you get a page with the option to dl a whole field.
this program allows you to view the fits images in Photoshop
http://www.spacetelescope.org/projects/fits_liberator/
The images are incredibly deep, ive never seen anything like it. In nearly every firld theres some sort of nebulosity.
I downloaded the field that has the Norma nebulosity and NGC 6164-5 on it, then cropped part of it and played with the processing a bit, look how deep it is, incredible.
Scott