thanks folks.
Paul I'm working on the flex, and I think I might have the issue sorted. I'll try your different exposure length comparison idea and see what it shows.
M_o yes I do have nice skies, weather and moon permitting.
On the dark nights and little moisture in the air sigma octans is visible and that is in the direction of Brisbane. I'm in behind the Sunshine Coast with a range of large hills/ small mountains between me and the worst of the sky glow.
Thanks Jeanette. I'm tossing up atm. I like the idea of the simplicity of the modded 20D which has similar pixel size and a one shot colour. But the increased resolution of RGB and the ability to bin and reduce imaging time is tempting. 20D is winning out atm as I'm more familiar with it than RGB.
Oh I'll have plenty of time before AF Dave. Haven't you heard that the clouds are going to part and give us months of clear weather for practicing.
