I'm looking to try M57 for the first time. My scope will be a EdgeHD 8, probably with the reducer since it's setup that way for the rest of galaxy season. And my camera will be either a 2600MM or MC (both available).
First, this should really be a RGB target, correct? The coloring makes me think Hubble palette, and I see a few images stated to be acquired this way. However, as a planetary nebula, there not really strong SII, Ha, or OIII emission, correct? I have seen some comments to augment with some H-alpha for the exterior gas clouds.
Second, what about capture strategy? I've seen a few images that look really good capture with "lucky imaging". They were using roughly 5 second exposures and thousands of them. They also were imaging at almost 3000 mm FL.
Then traditional with similar broadband exposures (3ish minutes). These seem to lack detail, which makes sense with such a small target and long exposures affected by seeing.
While relatively "bright", it's still a magnitude 8.8ish. So my gut reaction to lucky imaging is that it wouldn't work well. But again, thee results did look good.
Any insight or advice for capturing M57? Thank you for any thoughts?