On the left hand side is the data from 42x1800s exposures and on the right is 9x1800s - You can see that there's a big difference in noise and also in data quality. Below is a close up comparison of the background between the two lots of data.
10/4/2016 04:38:44 pm
10/4/2016 05:49:49 pm
Thanks! Glad that you like it!
10/4/2016 08:31:21 pm
Do you dither between frames Sara?
10/4/2016 08:36:24 pm
I do indeed Steve.
Hi Sara. Its great to see this comparison. I have been using Deep Sky West for my remote imaging now, and they typically image each object for 25 hours of data normally imaging 1800 second subs. I really crunch through the data on the computer and it takes awhile to accumulate this much imaging time using 3 filters in narrowband, but the results are definately worth the wait.
11/4/2016 09:17:30 am
Cheers Don - It depends for me what system I am using. The Tak FSQ85 is much quicker and I can get an acceptable mono Ha image for example with 8 hours data..... Not so with the bigger and slower ODK10.... But I keep plugging away at it :)
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Sara Wager is an astrophotographer with published articles and images to her name