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Old 11-04-2010, 11:39 PM
Hagar (Doug)
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Hagar is offline
 
Join Date: Oct 2006
Location: Australia
Posts: 4,646
Question Another Eta in Ha RGB Added Help needed.

The sky finally cleared long enough to capture a quick image of Eta Carina in Ha. Maybe we might get some clear nights here over the winter months and I might get to try this camera out a bit more with the Tak and RC.

I've added two images to the screen . The first is a straight RGB of 25 minutes per colour. I seem to need to tune my polar alignment a little as I did suffer some field rotation between shots but have now found the control in Maxim which allows a group of say red images to be collected consecutively instead of one of each colour in turn. This may help a little.
The second image is a combined image using the Ha as a luminance channel. My problem here is getting the colour good without changing it to a nice salmon colour during the blending.
Any help will be appreciated.

Image details:
Telescope: Takahashi FSQ 106ED at F5 on Losmandy G11
Guiding: QHY5 with WO 70 mm
Camera: QHY9 with Baader 7nm Ha filter.
Exposures: 6 X 10 minute exposures
Processed in IP 3 and Photoshop CS4 64 bit.

http://www.darkskyau.com/cm/displayi...241&fullsize=1
this image is 440KB but is a bit higher resolution.
Attached Thumbnails
Click for full-size image (Eta-Ha-web.jpg)
194.0 KB85 views
Click for full-size image (Eta-Carina-RGB-web.jpg)
196.9 KB48 views
Click for full-size image (RGB-Ha-Lum-sep-colours-combined-web.jpg)
197.6 KB49 views

Last edited by Hagar; 13-04-2010 at 09:24 AM.
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