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I have now photographed this target at 4 different focal lengths: 85mm, 200mm, 350mm (this one), and 640mm. This might have been my favorite of them if it weren't for the dang lens flare from Antares on the left. I attempted to suppress it in processing, but was only partially successful. I'll have to investigate further, but I suspect that the dew shield doesn't extend far enough to shield the objective from a star that close to the edge of the field. Still, I love the details in the dark nebulosity.

William Optics Star71 at f/4.9
QSI583ws with Astronomik LRGB filters
Sirius mount

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