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Old 27-01-2010, 01:41 PM
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Rosette in Ha - Climbing the QHY9 learning curve

Hi all

I'm still lacking adaptors to use my LRGB filters/filterwheel, but Ha is doable, so I'm learning what I can in the meantime.

Many thanks to those that suggested (in a thread started by Robin) the optimal orientation for power cables and camera USB setting - that sorted a worrying column noise artefact I saw in my first pics, as well as allowing me to collect some reasonable darks, bias and flat frames.

This effort taken over Sat and Sun nights, 2hrs of 5min Ha subs, but whittled down to 1hr of those subs with the best tracking. I'm still learning how to best balance the rig with the extra cables and different weight distribution. I'm very happy with the extra fine detail the QHY9 is giving up over the 450D. Still plenty of mountain left to climb and explore...!
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  #2  
Old 27-01-2010, 02:00 PM
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I like it Rob well done
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  #3  
Old 27-01-2010, 02:19 PM
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Hi Rob:
Great definition. Well done.
Many grettings
Cesar
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  #4  
Old 27-01-2010, 02:36 PM
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A very cool image! Great focus and detail!
Do you have to use dark frames with the QHY9?
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  #5  
Old 27-01-2010, 02:57 PM
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Ooo yeah! Straight to the poolroom
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  #6  
Old 27-01-2010, 03:10 PM
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Awesome Rob.
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Old 27-01-2010, 03:48 PM
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Nice detail! Very good framing dead centre! What nm is your Ha Filter?
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Old 27-01-2010, 03:53 PM
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Great work Rob... You'll have to figure out that balancing and get your tracking nailed down, with Ha in the burbs you can image up and indeed over 30 minute exposures!

I really love the tight stars a newt gives in NB images.
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Old 27-01-2010, 05:31 PM
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That is a wonderful image that I can almost fall straight into.

Frank
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Old 27-01-2010, 05:39 PM
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Very nice Ha detail Rob!
A great start with the new camera!
One day
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  #11  
Old 27-01-2010, 05:51 PM
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Yes Rob, detail galore.

Can't wait to see your LRGB, You must be excited!

Darren
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  #12  
Old 27-01-2010, 06:00 PM
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Rob,

Great Image and fine detail

Look like all those hours at Peter's is paying off

Geoff
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  #13  
Old 27-01-2010, 06:08 PM
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Quote:
Originally Posted by CoolhandJo View Post
Nice detail! Very good framing dead centre! What nm is your Ha Filter?
^ what he said.

Looking forward to a colored rendition.
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  #14  
Old 27-01-2010, 06:21 PM
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Looking good and it is very sharp.
I am expecting my QHY9 on tuesday next week
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  #15  
Old 27-01-2010, 07:29 PM
Mighty_oz (Marcus)
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Very nice indeed looking at getting one of these 2. Was this done on your Skywatcher 8" F/5 Newt ? on the heq 5 pro ?

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  #16  
Old 27-01-2010, 07:39 PM
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I want one.
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  #17  
Old 27-01-2010, 09:29 PM
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Many many thanks for your kind words of encouragement everyone!
The family is pretty sympathetic to the cause, but don't always understand the obsession and excitement.

Quote:
Originally Posted by TheDecepticon View Post
A very cool image! Great focus and detail!
Do you have to use dark frames with the QHY9?
Hmm - I suspect its not essential, but I don't have any experience on just how necessary they are yet. The KAF8300 chip is supposed to have a bit of noise over the Sony in the QHY8s, but its so easy to set the temp and let the camera and laptop run overnight collecting darks you can reuse, why not give it your best shot....

Quote:
Originally Posted by CoolhandJo View Post
Nice detail! Very good framing dead centre! What nm is your Ha Filter?
That's through the Baader 7nm filter Paul. QHY says they will sell a narrowband set eventually, but not available yet.

Quote:
Originally Posted by AlexN View Post
Great work Rob... You'll have to figure out that balancing and get your tracking nailed down, with Ha in the burbs you can image up and indeed over 30 minute exposures!

I really love the tight stars a newt gives in NB images.
Cheers Alex. I'd like to be able to open her up more, but its a delicate balancing act. I probably need to bite the bullet and pull down the HEQ5, but don't have the time currently, and would like to have quite a bit of PE data on hand first to check if I actually make it better!

I don't think this is as crisp as your spectacular 20mins subs through Peter's 127Apo either dammit! Filtering out the dodgey frames made quite a difference though.

Actually playing with this made me realise I've got work more on masking my stars during processing - the brighter ones started out a lot finer and less blown out than what I've finished up with here. I'm still getting used to pulling the Curves down rather than up in PS for mono.

Quote:
Originally Posted by ozstronomer View Post
Rob,

Great Image and fine detail

Look like all those hours at Peter's is paying off

Geoff
Thanks Geoff - seemed a shame to use up such a nice night playing and learning, but you have to start somewhere.

Quote:
Originally Posted by mill View Post
Looking good and it is very sharp.
I am expecting my QHY9 on tuesday next week
Happy for you Martin - you're in for a quite a happy ride!

Quote:
Originally Posted by Mighty_oz View Post
Very nice indeed looking at getting one of these 2. Was this done on your Skywatcher 8" F/5 Newt ? on the heq 5 pro ?
Yep - shot through the Newt. I've never wanted to cut the tube down though, so I can only get focus using an MPCC (which is pretty important anyway to fight off coma). Can't quite get 2 filters in front of the MPCC though to shoot RGB + IDAS pollution filter from the burbs.

Quote:
Originally Posted by Jeff View Post
I want one.
There's still another month before the current camera plus filterwheel deal ends though Jeff....
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  #18  
Old 27-01-2010, 09:38 PM
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That is an amazing photo Rob. What detail. You must be loving the new challenge and the outcomes look great. Can you imagine this with colour.

Mark
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  #19  
Old 27-01-2010, 09:58 PM
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Huge scale and heaps of detail.
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  #20  
Old 28-01-2010, 04:58 AM
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Well done!
I am still taking my photos with a 350d. When I see results like that, I think its time for the next step forward. No easy step, but its worth the effort. You showed me..
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