Author Topic: NGC2170 better processing  (Read 255 times)

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Carole

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NGC2170 better processing
« on: Oct 25, 2018, 10:32:06 »
I was never happy with this image it was far too noisy, especially after seeing it displayed on the OAS monitor last night.

So I re-worked it again to try to reduce the noise.

I forgot to mention (as this is not a well know target) that it is between Sirius and Alnitak, so could not start to image it until after midnight.  So it is quite low. 

This is the original:
http://forum.orpington-astronomy.org.uk/index.php?topic=11498.0

Atik460EX.ED80 + focal reducer x 0.8
HEQ5

Luminance 10 x 450 binned (decided to bin to save time)
Luminance 2 x 600
Red 12 x 300 binned
Green 11 x 300 binned
Blue 11 x 300 binned

Total imaging time 5 minutes under 4 hours.


« Last Edit: Oct 25, 2018, 20:29:41 by Carole »

Apophis

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Re: NGC2170 better processing
« Reply #1 on: Oct 25, 2018, 10:45:50 »
Just wondering why the noise , does binning add noise ?
Roger
Watch the skies.................

Carole

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Re: NGC2170 better processing
« Reply #2 on: Oct 25, 2018, 10:57:22 »
Stretching of dim targets mainly.  Insufficient data.
Careful processing is needed which I needed to improve upon.

Binning only affects the resolution.

Carole