DJS 2020

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Posted by Bob on February 2, 2020 Full Size|

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Reply Doug
3:43 PM on February 2, 2020 
Image of Messier 45 - The Pleiades or Seven Sisters. This image was taken prior to the one of Orion and its companions.

Image captured on the 20th Jan, taking advantage of one of those rare occasions when there was a clear sky and no moon to wash the sky out.

Telescope: William Optics RedCat 51mm with a focal length of 250mm and focal ratio of f/4.9. Excellent flat field performance.
Camera: Canon EOS 6D (mk1) unmodified. Controlled using an app on my old Nexus 7 tablet, connecting to the camera using USB adaptor cable.
Mount: Skywatcher Star Adventurer portable equatorial mount on a Manfrotto tripod, unguided.

Image: 12 light frames with exposure of 2mins at ISO800, calibrated, aligned, stacked and post processed in PixInsight. 2mins exposure was pushing the unguided mount to the limit resulting in more than half the images (a total of 25 taken) captured being discarded due to the effects of periodic error.