While housesitting SW of Tucson, Arizona last week, I set up my APM140-980 and imaged my first star cluster - M13. I processed 365 one-minute subs, total integration 6 hours 5 minutes. My processing skills are slowly evolving, I think post processing is just about the hardest part of this hobby. I enjoy learning and I look forward to continue to learn astrophotography. While I was in the Tucson area, I visited Starizona and bought Charles Bracken's book - The Deep-Sky Imaging Primer.
Another First (For Me)
Posted 28 May 2023 - 04:11 PM
Excellent image. I was shooting M13 recently as well and after processing the first night’s sub shot at 60 seconds. I couldn’t tame the core down so I shot 30 second exposures the next two nights for a total of 7 hours of integration time. Even at that the core is still pretty hot. Not sure how or if that problem can be solved.
Bracken’s book is excellent. Good move there.
- Koop likes this
Posted 28 May 2023 - 07:57 PM
There's some great stuff going on with this image. I don't know what you're using to process but you might want to look into using star-color calibration. PixInsight can do it from plate solving and actual catalog photometry of stars in your image; Astro Pixel Processor uses a statistical model that works amazingly well.
While it's not quite true that there's no green in space, if you see green stars, you probably still have some work to do :-).