Hi all,
I'm looking for some advice in regards to my soon to be expanded AP equipment list.
I'm looking to graduate to mono CCD imaging

and I'm not sure if certain things will work.
Firstly, I love imaging galaxies. But before I actually tried it with M83 some time ago, I didn't realise that it would be so small on the DSLR chip. Having a FL of 800mm as my longest of the two I have, I didn't really know anything about image scale before I bought my two scopes.
Anyhow, I was thinking whether I can reduce this issue using a 2x powermate to give me a focal length of 1600mm? Would this work or does it cause other issues?
The other thing, is that I am looking into an ATIK 314+ mono, and with a chip of 11.2mm diagonal, the FOV is limited. I would like to use a bintel .5 reducer to open the FOV up a bit (when imaging nebula). Would this be useable or is coma going to be an issue even with this small chip?
Also, I don't know a lot about over sampling/under sampling so any advice there would be good.
Apologies for the long post.
Goran.