Thanks all for your comments. I actually shot this without an LPR filter as it is at f/9. I just maximised the signal to noise of all three colour channels and ended up with this image. I am sure that the colour balance is being affected by the inherent light pollution at my suburban site.
What is really interesting how well the TAL200K does at resolving the objects in the field. The curved spiders also do not introduce annoying diffraction spikes but 'fuzzy' flairing around the brighter stars. The HDR method is the major reason why you can see the two lobes of the Homunculus around Eta as well as all the faint nebulousity.
Below is a HDR from 2,4,8,15,30 sec exposures of Eta and a Hubble image animated gif. These were taken on the same night as the large image.
Jase it was done at 1790mm and f/9 with the TAL200K. The EQ6 with belt drives and the Bartels system has no problems accurately tracking even at this FL. There is NO (discernible) backlash as the mount has been adjusted to within a tad and shown the firing squad just in case. The only regret I have is that I had the wrong spacer (thin) in the Hutech FR/FF so there is a bit of field curvature.
Here is an image with the correct spacer but focus went slightly off with a very large drop in temperature.
With the image viewer in my older XP box (amd3200) the zoom function seemed quite slow. With the new Vista 64 box (quad Intel 9450 (2.6ghz) the zoom is lightning quick even on big DSLR images. Moving the scroll wgeel on the mouse sees instant results
Scott
