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Old 07-06-2012, 10:22 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,820
Hi Guys

Thanks for the comments. The “false” atmosphere around Venus is an alignment, stacking and processing artefact. This is not readily discernible when looking at the finished photo, but when you see the “Live View” images you can see the dramatic effects of the Earth’s atmosphere producing a “boiling” effect around the limb of Venus.

Although I have tried to minimise this effect in the processing workflow, it is quite difficult to eliminate it completely.

I spent most of the day with the Vixen 4” refractor collecting whole of disc photos, as the seeing didn’t really support the longer focal length of the Mewlon. We also had family and neighbours around, so we made it more of a social occasion than a hard core recording event. I had a few issues with clouds, trees and roof tops blocking the views at the opening and closing stages of the event.

Here is a single frame to show the boiling limb of Venus.

Cheers

Dennis
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