Trevor, the image was taken with an Opticstar 145m and I used astronomic filters, the camera had the Sony ICX285AL chip which is quite good in terms of sensitivity - but a little small for the 127mm F7.5 refractor I use it with - a better idea of what the camera can do is shown by this image...
http://www.iceinspace.com.au/forum/a...se.php?a=73946
Mike, I did have to stretch quite a bit but did not clip the blacks - I did notice the histogram was very steep though - I think because my subs were too short...