Took some images over two nights of the Helix Nebula. I never realized how dim it was. I now have a better appreciation of others efforts with this dim target.
Large image 1.4 MB
http://members.optusnet.com.au/~fmlee/Helix_NB.jpg
Details
Canon 5DH modded 100Ed at 686mm f/6.8, EQ6 mount.
11x8 min at 1600ISO Astronomik HA filter
21x8 min at 1600ISO Astronomic O3 filter
I recombined the HA red to RED
O3 green to GREEN
O3 blue to BLUE
The image is cropped to centre the target and the FOV is 2.14x1.32 degrees.
Bert