Orion was on its way toward the meridian early one cold morning in early October when I got a few minutes on it with a vintage 300mm telephoto lens. No flats, bias or dark frames but I dithered and used kappa-sigma clipping during stacking. Camera on tripod only with tracking using Astrotracer (built in to camera). This image has been cropped to about 25% of the original APS-C frame (by area). Strong longitudinal chromatic aberration (red bloat) remains in the image, which is a result of the vintage nature of the lens. That can be reduced significantly with more comprehensive post-processing.
_Imager: Pentax K-3II DSLR (APS-C). _Lens: SMC Takumar 300mm f/4 @ f/5.6 _Exposure: 12 minutes (48 x 20s @ ISO 1600). _Tracking: Astrotracer (built in) _Date: October 5, 2019. _Location: Near Conestogo Lake, Ontario, Canada. _Sky Conditions: Bortle ~3.5 (SQM ~20.9), better-than-average transparency.
Image META information
|Original File Size||367326|
|Sections Found||ANY_TAG, IFD0|
|HTML Sizes||width="1059" height="1355"|
|Byte Order Motorola||FALSE|
|Software||Picture Window Pro 64 v7.0.20|