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Good result for a single exposure. The Ra looks like it handles noise well too, especially at 6400iso and is also picking up the Ha. Imagine even just 20 of these stacked and with the dark skies you have up there, it would look pretty spectacular. It's amazing what can be achieved these days with such short exposures. How does the ALT/AZ mount track? Stars are a bit eggy but you're probably at more than 2000mm focal length which would require some precision. Just as well you have a full frame sensor or you wouldn't have seen a lot of the Lagoon!
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