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  #21  
Old 16-04-2018, 10:51 AM
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Octane (Humayun)
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High resolution Moonage incoming?

Congratulations; what a great piece of gear.

H
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  #22  
Old 16-04-2018, 11:40 AM
glend (Glen)
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It looks like there is a filter drawer solution for the RASA:

https://stargazerslounge.com/topic/2...elestron-rasa/
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  #23  
Old 16-04-2018, 12:50 PM
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Or he could use a really good sensitive OSC CCD like the SX M25C or M26C...
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  #24  
Old 16-04-2018, 12:59 PM
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Quote:
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High resolution Moonage incoming?

Congratulations; what a great piece of gear.

H
Could try that with the gstar ex3
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  #25  
Old 16-04-2018, 01:32 PM
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I wait with baited breath for the unboxing of the doorstop
You know you have an open invitation.

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  #26  
Old 16-04-2018, 02:04 PM
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Or he could use a really good sensitive OSC CCD like the SX M25C or M26C...
With respect, the read noise for those two cameras are very high compared to modern CMOS cameras, meaning he would be forced into longer subs. In his light polluted environment, many short subs from an ultra low read noise camera is going to beat sky glow to a large extent.
And at that RASA focal length, 620mm, smaller pixels have a lot to offer in terms of resolution,imho.
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  #27  
Old 16-04-2018, 02:45 PM
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With respect, the read noise for those two cameras are very high compared to modern CMOS cameras, meaning he would be forced into longer subs. In his light polluted environment, many short subs from an ultra low read noise camera is going to beat sky glow to a large extent.
And at that RASA focal length, 620mm, smaller pixels have a lot to offer in terms of resolution,imho.
With a fast scope and heavy light pollution sky limited subs will be short on a CCD camera too and there will be negligible difference in the outcome.

Smaller pixels may be more suitable depending on the resolution/FOV trade off that David is looking for, but they will also collect signal more slowly.
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  #28  
Old 17-04-2018, 11:14 AM
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Just ordered a asi zwo 071mc pro
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  #29  
Old 17-04-2018, 11:24 AM
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Just ordered a asi zwo 071mc pro
Of course you did....
I wouldn't expect anything less from you....

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  #30  
Old 17-04-2018, 11:42 AM
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Just ordered a asi zwo 071mc pro
Is that all?
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  #31  
Old 17-04-2018, 12:34 PM
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Is that all?
Yep
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  #32  
Old 17-04-2018, 12:37 PM
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Sorry Photoshop is not my best instrument of photon mangling but here is a scrappy 2h11m ISO 400 unguided conglomerate image

Will redo in pixinsight later
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  #33  
Old 17-04-2018, 12:53 PM
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Lovely Mr. Hough! That's one hell of a Photon Pacman!

May I humbly recommend BackgroudNeutraliser in PI...
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  #34  
Old 17-04-2018, 01:23 PM
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Looks just like a bought one
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  #35  
Old 17-04-2018, 01:39 PM
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Looks just like a bought one
I am hoping that the 71 will allow better star colours and depth than the old 2008 Canon 450d.

And must relearn bad habits of PI
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  #36  
Old 17-04-2018, 05:42 PM
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well the other part of the puzzle arrived today - the specialised light pollution filter for the RASA
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  #37  
Old 18-04-2018, 09:05 AM
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Wow, how long are your subs going to be, like 10 sec ?
With my ASI071 I'm totally swamping read noise with 60-90 sec subs at F5.9 - buts that's in outer Sydney suburbs.
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  #38  
Old 18-04-2018, 09:47 AM
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Wow, how long are your subs going to be, like 10 sec ?
With my ASI071 I'm totally swamping read noise with 60-90 sec subs at F5.9 - buts that's in outer Sydney suburbs.
Will have to see, may not be longer than 60s
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  #39  
Old 18-04-2018, 09:47 AM
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well the other part of the puzzle arrived today - the specialised light pollution filter for the RASA
Good to see Celestron offering this filter. One of the big issues with ultra fast scopes like the RASA and HyperStar conversions, is the problems that emerge using standard filters, particularly narrowband ones and LPs, as the fast ratio light angles can be somewhat blocked by standard filters and can slew spectrum ranges outside the norms.
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  #40  
Old 18-04-2018, 09:49 AM
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Pixinsight version
http://www.iceinspace.com.au/forum/a...e.php?a=226785
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