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Saturn, M8, M20 & M21

astrophotography dslr planet dso star party tripod


Alen Koebel

Saturn, M8, M20 & M21

The region of M8, M20 and M21 with celestial interloper Saturn photobombing the shot. This is one of the first photos I took using the camera's Astrotracer feature, which tracks the stars internally. The camera was mounted directly on a tripod: no external tracker was needed. This was just a test; more subexposures would be needed for a truly decent image. No reduction of chromatic aberration in software has been done and the image could use it (the vintage lens I used contains no ED elements). No flats, darks or bias frames were used but I did use LENR and I dithered between shots. The full APS-C frame has been cropped somewhat for better framing.

_Imager: Pentax K-3II DSLR (APS-C). _Lens: SMC Pentax-M 200mm f/4 @ f/5.6 _Exposure: 4 minutes (4 x 60s) @ ISO 1600. _Tracking: Astrotracer (built in) _Date: August 10, 2018. _Location: Near Ayton, Ontario, Canada. _Sky Conditions: Bortle ~3, good transparency.

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