ICEINSPACE
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Waning Crescent 34.3%
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22-01-2014, 08:38 PM
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Turn the lights off!
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Join Date: Aug 2012
Location: Parklea NSW
Posts: 1,207
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22-01-2014, 09:04 PM
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Registered User
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
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Quote:
Originally Posted by dvj
That is an A-class image.
I've never thought of the Horsehead itself casting a shadow in the foreground dust clouds. Guess I'll be getting rid of that Honders soon.
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Thanks John, you can send the Honders my way if you want, I can always use an extra finderscope
Seriously though, I love the efficiency and simplicity of a large Newtonian, and IMHO with a decent corrector they produce images rivalling any other system.
Quote:
Originally Posted by Stevec35
Top result Rolf!
Cheers
Steve
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Thank you Steve, I just went for an easy target to stretch the wings of the new scope, but it did turn out nicely.
Quote:
Originally Posted by alistairsam
I've never thought of that either. you've brought out the dust details really well and the shadow really stands out. really cool especially from outer suburbs seeing. Was there any Light pollution to contend with?
Cheers
Alistair
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Cheers Alistair, yes that shadow caught my eye during processing so decided to show as much of the structures in the dust as I could.
Re light pollution, I have the light dome of Auckland to the NE where Orion was positioned during all the data gathering, so theoretically it will have interfered with the image, but I didn't notice any strong gradients or similar in the data.
Quote:
Originally Posted by DJT
Stunning picture, Rolf. Well done
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Thanks David!
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Originally Posted by David Fitz-Henr
Well done Rolf, a brilliant first image with your new scope! Nice colours and you have brought out a wealth of fine detail with 7 hours of luminance data My only suggestion would be that there does appear to be some sharpening artefacts in some of the dim regions in the nebula, but a minor observation on a great image.
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Glad you liked it David. It was a joy to play with the data and see what could be brought out. As mentioned earlier I did experiment with my processing flow and tried some new things, and the result probably shows some artefacts at full resolution. I plan to refine my technique so stay tuned
Quote:
Originally Posted by iceman
Stunning image, Rolf. Congratulations.
This is now IOTW.
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Thank you very much Mike, that's an honour! The new scope certainly passed the test
Quote:
Originally Posted by Paul Haese
Nice work Rolf, Like I said on FB, there is plenty to like in this image. The full size image presents pretty well overall. Like the colour and detail. All these images of the Horse Head are making me impatient to finish the data collection for my image. Been months since I started, but I have a goal. Lovely work again Rolf. Top shelf.
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Thanks Paul, it was fun to try imaging this one as I've never done it before. I haven't even seen it visually although I have tried a couple of times but with no success. I suppose the new scope with its fresh coatings and larger aperture might give me a glimpse visually, I must try that.
Quote:
Originally Posted by John Hothersall
You've achieved great depth, the reflection neb has comes out extremely well, love the highlights on the horse. Very powerful image.
John.
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Cheers John, I'm glad you liked NGC2023 too. Was it not for the Horsehead this would be a popular nebula in its own right, but alas it lies in the shadow of its more famous neighbour, literally!
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22-01-2014, 09:05 PM
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Registered User
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
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Quote:
Originally Posted by Rod771
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Thank you Rod!
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22-01-2014, 10:17 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,113
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What's not to like?
Beautiful optics. Excellent guiding.
I'm hard pushed to find any processing artifacts.
None really.
Stars are well resolved and tight (something you can only get with a long FL ).
More data would smooth out the continuum, but so what.
A benchmark HH for sure
Last edited by Peter Ward; 23-01-2014 at 12:08 AM.
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23-01-2014, 10:48 AM
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Registered User
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Join Date: Jan 2012
Location: Melbourne
Posts: 3,612
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Rolf,
Quote:
I love the efficiency and simplicity of a large Newtonian,
and IMHO with a decent corrector they produce images rivaling any other system.
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Hi Rolf,
I had a look at all your pics & noted this one:
http://www.rolfolsenastrophotography...ss/i-pnZShqQ/A
I can't quite understand how the guitar string collimation system works
& also why it doesn't cause multiple diffraction spikes?
The collimation you have achieved is obviously superb.
An RC or classical Cassegrain would have better spot sizes further off axis
but the KAF8300 is not such a large sensor where it would be apparent.
Still - I have learnt a lot from your thread about building this scope:
http://www.iceinspace.com.au/forum/s...t=98823&page=2
I am thinking of ideas on how to improve my own setup.
Congratulations on the IOTW.
cheers
Allan
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23-01-2014, 12:10 PM
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IIS Member #671
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Join Date: Dec 2005
Location: Canberra
Posts: 11,159
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What an outstanding image, my friend.
H
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23-01-2014, 12:22 PM
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Billions and Billions ...
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Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,142
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Yes indeed ... outstanding Rolf! Congrats!
Cheers, Marcus
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23-01-2014, 12:45 PM
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Registered User
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
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Quote:
Originally Posted by Peter Ward
What's not to like?
Beautiful optics. Excellent guiding.
I'm hard pushed to find any processing artifacts.
None really.
Stars are well resolved and tight (something you can only get with a long FL ).
More data would smooth out the continuum, but so what.
A benchmark HH for sure
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Thanks very much for the kind words Peter! I also expect improved seeing conditions once more settled weather rolls in here. So even higher resolution should be possible
Quote:
Originally Posted by alpal
Rolf,
Hi Rolf,
I had a look at all your pics & noted this one:
http://www.rolfolsenastrophotography...ss/i-pnZShqQ/A
I can't quite understand how the guitar string collimation system works
& also why it doesn't cause multiple diffraction spikes?
The collimation you have achieved is obviously superb.
An RC or classical Cassegrain would have better spot sizes further off axis
but the KAF8300 is not such a large sensor where it would be apparent.
Still - I have learnt a lot from your thread about building this scope:
http://www.iceinspace.com.au/forum/s...t=98823&page=2
I am thinking of ideas on how to improve my own setup.
Congratulations on the IOTW.
cheers
Allan
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Hi Allan and thanks. There are 8 strings attached to the mirror holder and they are arranged in a cross like traditional spider vanes. You can (faintly) see how they line up in this image from the 10" : http://www.rolfolsenastrophotography...#!/i-HG6cQrr/O
Each string can be tightened/loosened via its own guitar tuner, so full positioning and orientation is easy to achieve for the secondary mirror. I have found it much easier than traditional spiders where you typically have to adjust with tools and go back to the eyepiece and check. Here I can turn the guitar tuners by hand while looking in the eyepiece to see the effect. It is also really easy to make careful micro adjustments which helps getting everything aligned optimally.
The two strings that make up each 'vane' don't have to overlap each other but just need to be parallel in order to appear as a single spike in the image, if that is what you mean. They of course also need to be parallel with the two strings on the corresponding opposite side, and overall this lineup can be tricky to achieve but once adjusted I don't have to touch it again since collimation is maintained by adjusting the primary, not the secondary.
Hope that helps
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23-01-2014, 12:50 PM
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Registered User
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
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Quote:
Originally Posted by Octane
What an outstanding image, my friend.
H
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Thanks very much H, it's a classic target that never disappoints I'm glad to now have an image of it.
Quote:
Originally Posted by marc4darkskies
Yes indeed ... outstanding Rolf! Congrats!
Cheers, Marcus
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Thank you Marcus, it's good to be back in the game again with the new and larger scope finally finished.
Looking forward to your images with your new scope too
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23-01-2014, 01:08 PM
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Registered User
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Join Date: Apr 2011
Location: Sydney
Posts: 341
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The Horsehead is pretty detailed, like to color too.
Regards
David
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23-01-2014, 01:12 PM
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Registered User
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Join Date: Jan 2012
Location: Melbourne
Posts: 3,612
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Quote:
Originally Posted by SkyViking
Hi Allan and thanks. There are 8 strings attached to the mirror holder and they are arranged in a cross like traditional spider vanes. You can (faintly) see how they line up in this image from the 10" : http://www.rolfolsenastrophotography...#!/i-HG6cQrr/O
Each string can be tightened/loosened via its own guitar tuner, so full positioning and orientation is easy to achieve for the secondary mirror. I have found it much easier than traditional spiders where you typically have to adjust with tools and go back to the eyepiece and check. Here I can turn the guitar tuners by hand while looking in the eyepiece to see the effect. It is also really easy to make careful micro adjustments which helps getting everything aligned optimally.
The two strings that make up each 'vane' don't have to overlap each other but just need to be parallel in order to appear as a single spike in the image, if that is what you mean. They of course also need to be parallel with the two strings on the corresponding opposite side, and overall this lineup can be tricky to achieve but once adjusted I don't have to touch it again since collimation is maintained by adjusting the primary, not the secondary.
Hope that helps
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Thanks Rolf,
I'm still getting my head around string spiders.
It seems difficult to set up - for advanced telescope makers only!
I will investigate it more & thanks for the photo.
cheers
Allan
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23-01-2014, 01:26 PM
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Registered User
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Join Date: Aug 2013
Location: Gawler, South Australia
Posts: 559
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I never get sick of seeing the HH nebula
Wonderful image, lots of detail, just stunning.
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23-01-2014, 04:44 PM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,062
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Great resolution in that shot Rolf. Congrat on IOTW. Well deserved.
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23-01-2014, 05:03 PM
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ATMer and Saganist
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Join Date: Jun 2008
Location: Adelaide S.A.
Posts: 2,280
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Rolf,
what can I say,
brilliant...master class
Steve
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23-01-2014, 06:28 PM
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Registered User
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Join Date: May 2006
Location: Adelaide
Posts: 781
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Absolutely a cracker image!
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24-01-2014, 09:40 AM
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Registered User
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
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Quote:
Originally Posted by DavidNg
The Horsehead is pretty detailed, like to color too.
Regards
David
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Thank you David!
Quote:
Originally Posted by dutch2
I never get sick of seeing the HH nebula
Wonderful image, lots of detail, just stunning.
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Thanks Ingrid, although I have never imaged the Horsehead before it has always been one of my favourite nebulae
Quote:
Originally Posted by multiweb
Great resolution in that shot Rolf. Congrat on IOTW. Well deserved.
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Thanks very much Marc. I'm happy with the resolution from the new scope and there should even be room for improvement so it'll be interesting to see how the next images turn out, whatever the targets may be.
Quote:
Originally Posted by kinetic
Rolf,
what can I say,
brilliant...master class
Steve
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Thank you Steve, I'm glad you enjoyed it
Quote:
Originally Posted by swannies1983
Absolutely a cracker image!
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Thanks Dan!
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24-01-2014, 01:14 PM
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Like to learn
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Join Date: Jul 2007
Location: melbourne
Posts: 4,835
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Wow, that's amazing Rolf. well done.
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26-01-2014, 08:03 PM
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Registered User
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Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,918
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beaut image Rolf - top shelf from the new kit. regards Ray
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26-01-2014, 09:09 PM
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Registered User
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Join Date: Jan 2014
Location: Sunshine Coast Australia
Posts: 300
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Looks like 3D in some parts, great photo, better than what I have seen in many publications.
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26-01-2014, 11:08 PM
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Registered User
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Join Date: May 2005
Location: Brisbane
Posts: 4,485
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Almost missed this one. An exquisite image in all aspects and really never thought that the HH would throw a shadow until you pointed it out.
Remarkable.
Allan
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