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Old 05-03-2011, 10:45 PM
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RobF (Rob)
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Join Date: Jul 2008
Location: Brisbane, Australia
Posts: 5,735
Eta Carinae Mosaic (Star-less repros added)

Unashamedly inspired by Humayun's epic first light portrait of Eta with his Tak and SBIG gear, and with my lotto tickets yet to deliver, I figured now might be a good time to tackle my first large mosaic. I'd like to say I've put in a bigger secondary, 3" moonlight focuser and bought a 16803 based camera, but this is 8 frames in RGB combined using Pixinsight's wonderful mosaic tools. Its not too hard to spot colour transitions in the background in places, but I didn't want to pike out and just post in mono, and this is the best I've been able to do so far. I managed to botch collection of green and blue filters in the Eta region, and thus had to go back on a different night with the camera ever so slightly turned compared to the original data, so unfortunately the diffraction spikes on Eta Carina are a little out of whack.

Collected over a few nights early in February, then processed nearly every night for the last 3 weeks:

8 frames RGB 15:15:15 (5x3min subs per frame)
(QHY9/QHY filters/8" Newt & MPCC)
Attached Thumbnails
Click for full-size image (Eta-Mosaic.jpg)
196.6 KB131 views
Click for full-size image (GabMistral.jpg)
172.9 KB101 views
Click for full-size image (Eta-crop.jpg)
150.9 KB128 views

Last edited by RobF; 11-03-2011 at 10:23 PM. Reason: Added starless versions to title
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