Absolutely beautiful image!!!
I'm working on a similar rig. Can you comment on the following questions:
1. I see you are using a 3nm H-Alpha filter. Any reason you chose this over a less expensive 5nm astrodon?
2. Can you comment a bit on your workflow of how you performed the drizzle integration and if there is anything you need to do during image capture to allow this? Or is it post-processing only?
3. And finally, what was your method for focusing the 50mm, especially when shooting the H-Alpha?
1. I've already learned that, assuming you will continue doing astrophotography, you're best off getting the best equipment you can reasonably afford, so you don't have to buy another one later. The 3nm filter will support any future imaging I do. I'm aware of the possible issues with narrow bandwidth filters at low focal ratios, but I think that's overblown unless you're operating at very low focal ratios.
2. The workflow is pretty straight-forward. I just do a regular integration, saving drizzle files, and then do a drizzle integration. I do direct-mount dithering during acquisition when I don't guide. I've found myself doing less and less processing as I go on. Different strokes for different folks, but I prefer to have the images relatively raw and concentrate on acquisition, rather than processing. For example, my favorite noise-reduction algorithm is more integration time.
3. Focus is probably one of the tougher things with my set up. I find I stop and tweak it a bit at first, as the equipment temperature equilibrates, and then usually once more at the meridian flip.