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Old 11-12-2017, 01:09 AM
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NGC7380 with new QHY128C in narrowband

I recently received a QHY128C OSC camera to test and since the moon was bright I decided to test how well/IF this OSC camera could capture narrowband (Ha/OIII). The results were surprising and encouraging.

This image of NGC7380 has 4hrs Ha and 4.5hrs OIII captured with the 128C and my CFF250RC. RGB color data was supplied by a QHY163M and SV80ST.

http://buckeyestargazer.net/Images/T.../NGC7380_3.png
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Old 11-12-2017, 06:14 AM
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Hi Joel,
the image you've posted is only a tiny thumbnail.
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Old 11-12-2017, 06:27 AM
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Hi Joel,
the image you've posted is only a tiny thumbnail.
Thanks, I thought I posted a visible thumbnail image here that linked to the full image on my website.

Here's the link: http://www.buckeyestargazer.net/Page...ae/NGC7380.php

http://www.buckeyestargazer.net/Imag.../NGC7380_3.jpg
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Old 11-12-2017, 07:28 AM
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Hi Joel,
that's looking very good.
You have very tight stars - that's top optics.
I would have been tempted to do some local contrast adjustments
in the brighter areas with a blurred layer mask.

cheers
Allan
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Old 11-12-2017, 09:05 AM
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That turned out well, Joel. How did the individual NB masters look? Did you notice a lot of difference from doing it with a mono camera?

Cheers,
Rick.
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Old 11-12-2017, 10:48 AM
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That turned out well, Joel. How did the individual NB masters look? Did you notice a lot of difference from doing it with a mono camera?

Cheers,
Rick.
I actually directly compared the Ha from the QHY128C with Ha from my mono G3-16200. These images are each 4hrs total exposure. It's hard to tell the difference. The QHY128C shows a bit better dynamic range, but the G3-16200 is perhaps less noisy. Which is expected since the QHY128C is really just the "red" channel from the camera.
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Old 11-12-2017, 11:42 AM
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I had always assumed that NB would be difficult with an OSC camera but maybe it's not so bad...
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Old 11-12-2017, 12:36 PM
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I had always assumed that NB would be difficult with an OSC camera but maybe it's not so bad...
That is true of traditional CCD cameras where the read noise is higher. Lower noise CCDs and especially these new CMOS sensors make this more realistically possible.
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