ICEINSPACE
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Moon Phase
CURRENT MOON
Waxing Crescent 34.6%
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11-01-2011, 07:01 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,689
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The Seagull - two very different versions
As I sometimes do  ...here is a comparison, this time with an image by the UK Schmidt of this beautiful area.
I looked for a large version of the UK Schmidt shot but this was the biggest I could find on the web which isn't very big so I also had to reduce the resolution of my shot down too match.
You can read how the UK Schmidt shot was composed in the info under the image.
Anyway t'was just for fun...apart from the colour pallet, the results are surprisingly similar as far as image depth and details are concerned 
Mike
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11-01-2011, 07:11 PM
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No More Infinities
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Join Date: Apr 2008
Location: Townsville
Posts: 9,698
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Very interesting comparison, Mike. Very similar shots
Your colour palette is the better one, though. That orange looks a little sickly in the AAO shot.
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11-01-2011, 07:18 PM
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Love the moonless nights!
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Join Date: Mar 2009
Location: Sydney
Posts: 2,285
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I am actually the other way, I rather like the orange, I think the pinks in Mikes one are a little too pink for me.
The clarity of Mr Sidonios picture though, I think puts the the Schmidt to shame, considering the price and aperture difference.
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11-01-2011, 08:24 PM
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Quietly watching
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Join Date: Jul 2007
Location: Yarra Junction
Posts: 3,044
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Another interesting comparison, the 1200mm scope obviously outdoes the 150mm one ..... Duh..... However on a cost vs image basis mikes well ahead.
Interesting color difference, all the amatuer ones I've seen always have the pink rather than the orange, I haven't checked the details of the uk one but I make the assumption they have just used the alpha line and not included the beta one, even so i personally prefer a deep red if thats the case interesting just to see the detail in the faint reflection nebulosity around the head area.
Edit.... Will have a read on the bottom of the image for details of uk shot..... Hehe just looked at the picture.
Further edit... I see they've just used the red and blue plates, some amateurs have been doing that , downloading the different plates and combining them to create their own versions... It was in a mag a while back....
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11-01-2011, 08:33 PM
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Moderator
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Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
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well i am going to say great stuff, or something to that extent 
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11-01-2011, 08:55 PM
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Registered User
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Join Date: Dec 2008
Location: Melbourne
Posts: 773
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Mike, you did it again, excellent stuff!!!
Alex
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11-01-2011, 11:29 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
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Cheers guys
Hmmm?..so is a 1.2m aperture F2.5 with a 400mm diameter corrected and illumated image circle, the ultimate imaging scope..? 
It's nice to see that modern technology has narrowed the gap considerably for the small fry though 
Mike
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11-01-2011, 11:39 PM
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SPACE CADET
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Join Date: Jan 2011
Location: North Maclean, Qld
Posts: 130
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WOW, that is amazing and I mean that for both of them, excellent.
Regards, Dutch
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12-01-2011, 01:08 AM
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Registered User
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Join Date: May 2009
Location: Italy - Turin
Posts: 771
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Congratulations Mike, you are a reference one for sure....
Stunning image...i think tomorrow may be an well deserve APOD
Ciao,
Leo
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12-01-2011, 06:34 AM
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accepts all donations
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Join Date: Feb 2006
Location: Braidwood (outskirts)
Posts: 2,281
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Its simply amazing that in- relatively- short time span, we can produce images rivaling those of massive equipment 11 years ago.
frank
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12-01-2011, 09:24 AM
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Registered User
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Join Date: Aug 2010
Location: Canberra
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This is another indication of how much imaging technology has improved in the last 20 years if one was needed. Your version is a wonderful image Mike and clearly superior.
Steve
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12-01-2011, 11:46 AM
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avandonk
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Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
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Quote:
Originally Posted by strongmanmike
Cheers guys
Hmmm?..so is a 1.2m aperture F2.5 with a 400mm diameter corrected and illumated image circle, the ultimate imaging scope..?
It's nice to see that modern technology has narrowed the gap considerably for the small fry though
Mike |
It was designed for film, ie hypered tech pan from memory. Can you imagine what a colour/NB filter 400mm in diameter would cost? I would like to see it perform with a 400mm contiguous sized modern sensor as sensitive as Mikes. The needed exposures would be measured in a few seconds.
What also needs to be said is that the exquisite optical accuracy of Mikes 150mm optic with associated filters is barely matched by his sensor.
The old rule is still true. Nothing beats aperture!
There is also no point having more aperture and FoV than your sensor can collect!
How many of your sensors would it take to cover a 400mm plate Mike?
I think you will find it is about the same as the ratio of your optics aperture (in area) to the 1.2M UK Schmidt .
Bert
Last edited by avandonk; 12-01-2011 at 12:04 PM.
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12-01-2011, 12:37 PM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,689
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Quote:
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It was designed for film, ie hypered tech pan from memory. Can you imagine what a colour/NB filter 400mm in diameter would cost? I would like to see it perform with a 400mm contiguous sized modern sensor as sensitive as Mikes. The needed exposures would be measured in a few seconds.
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Also used Kodak blue green senstive fine grain IIIaJ etc
Quote:
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What also needs to be said is that the exquisite optical accuracy of Mikes 150mm optic with associated filters is barely matched by his sensor.
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CCD image scale = 1.4"/pix, 152EDF resolution 0.75", seeing >2"..?
Quote:
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The old rule is still true. Nothing beats aperture!
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Yeh, a type of fever is named after it even
Quote:
There is also no point having more aperture and FoV than your sensor can collect!
How many of your sensors would it take to cover a 400mm plate Mike?
I think you will find it is about the same as the ratio of your optics aperture (in area) to the 1.2M UK Schmidt .
Bert
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KAI16803 sensor 37mm X 37mm = 1369sqmm
400mm plate = 160 000sqmm = 117 X 16803 sensors to cover the field 
Hmm..?..maybe I could talk to the bank 
6" APO objective = 18142sqmm
1.2m Objective = 3 551 943sqmm = 196 times more aperture area
I think that's right..
Anyway Im upgrading to a 12" soon... so who knows what the future holds
Mike
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12-01-2011, 08:50 PM
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I have detailed files....
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Join Date: Feb 2008
Location: Kellyville Ridge, NSW Australia
Posts: 3,306
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Hey....!
Just checked APOD and indeed a Mr Michael Sidonio has the current APOD with a pic, not unlike this one!
Congrats Mike, well done indeed!
Cheers
Chris
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12-01-2011, 09:09 PM
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Registered User
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Join Date: May 2009
Location: Italy - Turin
Posts: 771
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Quote:
Originally Posted by Leonardo70
...
Stunning image...i think tomorrow may be an well deserve APOD
... |
 
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12-01-2011, 09:33 PM
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I have detailed files....
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Join Date: Feb 2008
Location: Kellyville Ridge, NSW Australia
Posts: 3,306
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Yes,
VERY good call Leonardo.....your comment is what made me look.
Credit where credit is due...
Cheers
Chris
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13-01-2011, 01:30 AM
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Registered User
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Join Date: Aug 2009
Location: Singapore
Posts: 933
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Very much deserved Mike! This is an extremely fine shot of this area!!
Clear Skies
Marco
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13-01-2011, 09:08 AM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,689
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Quote:
Originally Posted by Screwdriverone
Yes,
VERY good call Leonardo.....
Chris
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Leonardo da Clairvoiant
and cheers Marco
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13-01-2011, 10:57 AM
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Love reflection Nebs !
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Join Date: Aug 2006
Location: Streaky Bay
Posts: 1,070
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Mike, big congrats with the APOD with this image.
Well deserved.
All the best
Rich
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13-01-2011, 01:25 PM
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Registered User
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Join Date: Nov 2006
Location: Canberra, Australia
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Congrats on the APOD Mike.
Well done mate
Martin
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