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Astrophotography and Sketching >> Solar System Imaging & Processing

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yock1960
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Reged: 06/22/08

Loc: (Mostly Cloudy) Ohio, USA
detail or atifacts?
      #5680729 - 02/15/13 06:24 AM Attachment (72 downloads)

This is very rough, but I've never had a stack like this one. I just get the feeling looking at it, that I'm seeing double...at least in places. The central bands just look funny...is this a stacking problem?

Steve


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wenjha
Vendor


Reged: 09/24/08

Loc: SuZhou China
Re: detail or atifacts? new [Re: yock1960]
      #5680981 - 02/15/13 09:34 AM

I think its problem of stack.
you can set only one stack point and try again


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MvZ
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Reged: 04/03/07

Loc: The Netherlands
Re: detail or atifacts? new [Re: wenjha]
      #5681094 - 02/15/13 10:33 AM

I think it's a problem of (local) seeing, and/or optics alignment. I don't think it is stacking, unless perhaps you used some really weird stackign parameters, but then I would expect seems to appear, not blurring. I have never seen any results like these caused by stacking (although that doesn't mean it can't happen, just that I have never seen it before).

But Sams suggestion is good to verify that: use a single - large - alignment point, and see what the result look like.

Did you take more images, of so, what do they look like?
Was the telescope perhaps not at ambient temperature (when the scope was not isolated)?
How was the collimation of your scope?

Edited by MvZ (02/15/13 10:35 AM)


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yock1960
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Re: detail or atifacts? new [Re: MvZ]
      #5681194 - 02/15/13 11:17 AM

Quote:

I think it's a problem of (local) seeing, and/or optics alignment. I don't think it is stacking, unless perhaps you used some really weird stackign parameters, but then I would expect seems to appear, not blurring. I have never seen any results like these caused by stacking (although that doesn't mean it can't happen, just that I have never seen it before).

But Sams suggestion is good to verify that: use a single - large - alignment point, and see what the result look like.




I haven't tried that...I will.

Quote:

Did you take more images, of so, what do they look like?




Not like this!

Quote:

Was the telescope perhaps not at ambient temperature (when the scope was not isolated)?
How was the collimation of your scope?




Collimation is not perfect I'm sure, but fair at least. Temperature....maybe. I keep the scope in the garage and it was not very cold, so not too much temperature difference. But this was from towards the beginning of the session; I'm not sure how long it was from the time I set the scope out and this....less than 2 hours. I will check some of the other captures tonight.

Steve


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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: detail or atifacts? new [Re: yock1960]
      #5683239 - 02/16/13 11:06 AM

Try RGB align in Registax, looks like the color channels are ever so slightly out of alignment.

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yock1960
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Reged: 06/22/08

Loc: (Mostly Cloudy) Ohio, USA
Re: detail or atifacts? new [Re: shawnhar]
      #5683250 - 02/16/13 11:09 AM

Registax and I don't get along....but I'll give it a try Shawn. Thanks!

Steve


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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: detail or atifacts? new [Re: yock1960]
      #5683304 - 02/16/13 11:36 AM

LOL! I don't get along with it half the time either!

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ToxMan
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Reged: 01/23/11

Loc: Tucson, Arizona, USA
Re: detail or atifacts? new [Re: shawnhar]
      #5684384 - 02/16/13 10:54 PM

Ya, I'd try RGB align in R6. If you load your still image and press the RGB align button, then make the green box that pops up on the image large enough to just surround the planet, and press process button. If it doesn't help, then try stacking fewer frames and see what happens. I've gone that route when I suspect I have few, but high quality frames, say only 10 or 20%. For example, video has 6000 frames and end up only stacking 1500 frames.

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mrlovt
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Reged: 09/08/12

Loc: Smyrna, TN
Re: detail or atifacts? new [Re: ToxMan]
      #5693520 - 02/21/13 08:39 PM

I was thinking RGB align as well. Send us an update when you have time to reprocess!

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