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Old 09-05-2008, 07:23 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,827
Quote:
Originally Posted by gbeal View Post
I agree Dennis, interesting. Why is there a bright "star" upper right in the 5 min shot, and not in the 10?
Gary
Hi Gary

On the 5 min subs photo, the bright star saturated and began to bloom, so when I shot the 10 min subs some 3 nights later, I jogged the drive to move the star just outside the top of the frame to avoid blooming.

Quote:
Originally Posted by iceman View Post
very interesting, Dennis.

Were both sets of exposures taken on the same night? Or was the 5 mins one night and 10 mins the next?

To me the 10mins looks obviously better, but has the processing been the same? Was the seeing the same on that night?
Hi Mike

The 5 min subs were captured on 3rd May and the 10 min subs were captured on 6th May. In terms of processing, the “gross” processing was the same for both images, but then I experimented with different sharpening and star smoothing using the Noel Carboni Action.

I think the seeing was slightly better for the 5 min subs, but there wasn’t much in it. I guess the next experiment is to compare 6x5min with 3x10min stacks to compare the difference over 30 mins, rather than 30 and 60 mins.

Cheers

Dennis
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