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13 minutes of the Scultpor
My excuse is that everyone has to image NGC 253 at least once!
I took 19 x 1 minute subs and for the first time, had a go at analysing the quality of each frame. I used PixInsight to get the FWHM for the same star in each frame, and as per the attached graph, there was a bit of variation over the period that I was taking pictures; from 2.6" to 3.4". I discarded all frames with a FWHM > 3.0" leaving 13 x 1 minute frames for processing, and used the best one as the reference frame. I am interested to know whether others check the FWHM on each frame via PI, and whether there is an automated way to do it.
Nikon D7000
ISO 1250
Manual focus on camera display
13 x 1 minute subs
M14 SCT unguided
FL = 3556 mm
Processed with PixInsight, size reduction in LR4
Chris
Last edited by ChrisM; 05-11-2013 at 08:56 PM.
Reason: added FL
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