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  #1  
Old 01-06-2011, 09:13 AM
Hagar (Doug)
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First light TSA120 (CentaurusA)

This is my first light image with my new Takahashi TSA120. Cent A was the target as it was nice and high, a known target to guage the image against and would allow me to see how much detail could be extracted.

I have some major balance/guiding issues to overcome as a result of using a side by side set up with the FSQ and may well go back to a single scope. No field flattener was used for this image so I am pretty happy with this result.

Image details:
Scope: Takahashi TSA120
Camera: QHY9 mono with Baader LRGB fllters
No Field flattener
10 X 5 minute luminance subs
6 X 5 minute each RGB
Total = 50,30,30,30 = 2hrs 20 minutes
Guiding cut the image total and half the original subs were discarded.

I have included the full frame and a crop of Centaurus A.
Attached Thumbnails
Click for full-size image (LRGB-web.jpg)
196.8 KB169 views
Click for full-size image (LRGB-Crop-web.jpg)
188.5 KB162 views
Click for full-size image (LRGB-Croplighten-Decon-web.jpg)
198.0 KB223 views

Last edited by Hagar; 01-06-2011 at 09:37 AM.
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  #2  
Old 01-06-2011, 09:25 AM
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gregbradley
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You're off to a flying start there.

Greg.
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  #3  
Old 01-06-2011, 10:03 AM
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Cloudyagain (Neale)
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Thats a great image Doug. Have spent a bit of time on this one myself lately (nothing I want to post though), and I think you have pretty much got it all in there. I prefer the 3rd image with it's subtle extra detail but the then I also prefer the "lightness" and extra colour of the second. Well done.

Neale.
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  #4  
Old 01-06-2011, 10:38 AM
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Paul Haese
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Nice work Doug. Colour looks good and the field looks remarkably flat on the wider shot. Maybe no need for a flattener.
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  #5  
Old 01-06-2011, 10:46 AM
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multiweb (Marc)
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Geat scope. Great pic.
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  #6  
Old 01-06-2011, 10:51 AM
TrevorW
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Very nice Doug
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  #7  
Old 01-06-2011, 11:01 AM
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jjjnettie (Jeanette)
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Congratulations on a pretty speccie first light image Doug.
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  #8  
Old 01-06-2011, 12:22 PM
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strongmanmike (Michael)
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Yep looks great Doug and I agree with Paul, with that chip at least, it looks like you probably don't really need the FF..?

Mike
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  #9  
Old 01-06-2011, 03:31 PM
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Satchmo
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What is the F# Doug ?
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  #10  
Old 01-06-2011, 05:00 PM
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renormalised (Carl)
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Nice work there, Doug. New scope looks a pearler
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  #11  
Old 01-06-2011, 05:04 PM
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Jeffkop (Jeff)
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Geeze Doug, thats the second "quickie" that has ended up MUCH better than OK !!!! I think you've found the secret mate ... Seems to be ... dont sweat over it, just take the minimum qty of subs ... and sit back and impress everyone ... well its so with me mate ... GREAT result.
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  #12  
Old 01-06-2011, 05:23 PM
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Tandum (Robin)
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Doug they are a 900mm FL @ F7.5 scope aren't they? Do both SBS scopes see out the dome slot over the entire sky?
Looking good..
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  #13  
Old 01-06-2011, 06:14 PM
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bokglob (Darrell)
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Great firstlight there Dougee This scope is a beauty, not just as an astrograph, but also amazing with an eyepiece in! Congrats.
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  #14  
Old 01-06-2011, 07:45 PM
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Lester
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Wonderful image Doug, thanks for the view. You got a classy scope there. All the best.
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  #15  
Old 01-06-2011, 09:43 PM
Ross G
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Great shot Doug.

So sharp.

Thanks.

Ross.
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  #16  
Old 01-06-2011, 11:00 PM
Hagar (Doug)
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Thanks Everyone. I am certainly impressed with the scope so far and maybe I won't need the Flattener. A bit more experimenting required.

Mark it is an F7.5 at 900mm FL.

I am strongly thinking of putting the SBS back in the corner and just running one scope on the mount at a time. Really the extra effort and hassles of running two scopes and only using one far outweighs the benifits of having both sitting waiting to be used.

Thanks again.

Last edited by Hagar; 03-06-2011 at 09:30 PM.
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  #17  
Old 01-06-2011, 11:10 PM
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richardo (Rich)
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Congrats Doug, this looks like a winner.. lovely sharp details and stars.

Have fun!

Rich
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  #18  
Old 01-06-2011, 11:12 PM
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DavidU (Dave)
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I think this is an awesome instrument Doug. Your going to pull some stunning work out of this scope.
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  #19  
Old 02-06-2011, 02:39 PM
Hagar (Doug)
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Quote:
Originally Posted by richardo View Post
Congrats Doug, this looks like a winner.. lovely sharp details and stars.

Have fun!

Rich
Thanks Rich, I am looking forward to giving this scope a good work out. All I need is to get the weather Gods on side.

Quote:
Originally Posted by DavidU View Post
I think this is an awesome instrument Doug. Your going to pull some stunning work out of this scope.
Thanks David. Yes it's typical Tak quality right down to the Rack and pinion focuser.
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  #20  
Old 02-06-2011, 06:11 PM
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Paddy (Patrick)
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Nice work Doug.
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