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Unless otherwise stated all images were taken in a Bortle 8-9 white-zone with a ZWO ASI-178mm mono camera.
Messier 13. 20cm SCT, F10, exp 3 sec x 120 frames = 6 min.
Messier 56. 3 sec x 60 frames = 3 min, limiting magnitude=17.3.
Messier 71. 5 sec x 27 frames = 2.3 min, limiting magnitude=17.5.
M45. Nebulosity just starting to show. Taken with an ASI178mm camera on an 80mm, F5 refractor.
Exposure was 18 minutes. Image has a limiting magnitude of 15.0.
The Double Cluster (NGC869 & NGC 884).
Six-minute exposure using a Canon 80D with a 400mm lens at F8 at ISO 16,000.
M53. Magnitude 8.3. 20cm SCT, F5, 0.5X Focal Reducer.
2,100 frames x 0.4 seconds = 14 minutes total exposure,
M19 at magnitude 7.5.
20cm SCT, F5.6, exp=7.7 mins, EL=19 degrees, limiting magnitude=17.8.
Imaged through an open window.
The White Zone
An Urban Astronomer's Light Pollution Guide to Balcony Imaging
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