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  #21  
Old 29-10-2013, 07:07 PM
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baileys2611 (Simon Bailey)
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No problems Rx
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  #22  
Old 29-10-2013, 10:05 PM
Tony_ (Tony)
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G'day Simon,

Looking at the spots closer - I still suspect an insect. It must have been a very active one - I usually only get 4 or 5 spots.
(I still think if it's dust on the sensor you should be able to see it.)
Attached is your image - spots removed. (It could be done better but I hope you like it).

By the way if you want to get a better image of M42 - you need to take subs of shorter length also (maybe 10 -20 seconds) to avoid saturating the core. You then use layers and masks in photoshop to join the images of different exposures. Some people take subs of 4 different lengths to even out the difference in brightness. There are tutorials on youtube that explain how to do it.

Regards,
Tony.
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  #23  
Old 29-10-2013, 10:32 PM
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baileys2611 (Simon Bailey)
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Sensei! How did you do that magic??
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  #24  
Old 29-10-2013, 10:53 PM
Tony_ (Tony)
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It's actually fairly easy.
Open the image in photoshop. Make sure the image is flattened (layer flatten image).
Open the brush tool. Choose a brush size (top menu) about the size of the spots. (smaller will give a better result but it takes longer).
Move the cursor to an area next to the spot you want to remove, where the color matches the color you want the spot area to be.
Then "alt" "click" - this selects the brush color. Then click on the spot 2 or 3 times (or hold it down) until you are happy with the color match.
Do this to all the spots.

You can use this to remove blemishes in non-astro photos too.

Regards,
Tony.
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  #25  
Old 29-10-2013, 10:59 PM
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baileys2611 (Simon Bailey)
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Well I'll be! You're painting over with a sampler.

It looks like you've done some magic and got the gas to even be in the right shape.

I'm amazed. Definite eye opener for me and a large learning curve.
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  #26  
Old 11-11-2013, 09:27 AM
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baileys2611 (Simon Bailey)
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Thanks

Thanks everyone for your advice and help. I'm still learning but my latest attempt is attached (low res).

Higher res is at: http://bit.ly/16TUZxs
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  #27  
Old 12-11-2013, 08:06 PM
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Hey nice repro Simon, well done mate. Great result, looks very natural.
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  #28  
Old 13-11-2013, 11:10 AM
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baileys2611 (Simon Bailey)
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Thanks Rex,

+ Thanks for your help and others too in furthering my knowledge on imaging & processing. I'm still having trouble drizzle combining subs but that's just down to experimenting with settings and applications.
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