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Old 28-09-2008, 09:44 AM
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dugnsuz (Doug)
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Uncontrolled Re-Entry under the LMC

Hello all...
Talk about "right place, right time"

On Saturday morning (12:12am) I was out imaging the LMC rising in the south-east. Managed to capture what was described by eyewitnesses as a huge fireball passing overhead...
http://www.iceinspace.com.au/forum/s...ad.php?t=36294

The fireball is believed to be the remains of an intermediate stage of a Russian rocket used to launch satellites into orbit.
http://www.universetoday.com/2008/09...ct/#more-18716

Canon 40D (modded)
Canon 70-200mm f4L lens, 70mm @ f5.6
Skywatcher Synscan EQ5 mount
Autoguided with PHD

8x300sec, iso1600
Stacked in Images Plus,Tweaked in PS.

I've also included the LMC without the fireball!

High Res versions here...
http://s327.photobucket.com/albums/k...=Fireball1.jpg
http://s327.photobucket.com/albums/k...=Fragments.jpg
http://s327.photobucket.com/albums/k...rent=LMC27.jpg

Cheers
Doug
Attached Thumbnails
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Click for full-size image (Fragments-Web.jpg)
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Click for full-size image (LMC-27.9-Web.jpg)
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  #2  
Old 28-09-2008, 09:51 AM
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peeb61 (Paul)
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Geezz Doug you have done well there, I have a whinge about a fainty crossing my field of view and stuffing up an image but yours is something to talk about! Well done.

Top Shots.
Paul
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  #3  
Old 28-09-2008, 10:01 AM
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Tilt (Michael)
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Woohoo! Sensational...

By the way, the image without the intermediate stage re-entry is great too, I see you have knocked it back to f/5.6. Looks sharp, what are your thoughts on the difference between f/4 and f/5.6? I seem to be able to get a slightly sharper image from my 70-200 if I stop it down to f/4.

Michael.
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  #4  
Old 28-09-2008, 10:09 AM
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dugnsuz (Doug)
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Quote:
Originally Posted by peeb61 View Post
Geezz Doug you have done well there, I have a whinge about a fainty crossing my field of view and stuffing up an image but yours is something to talk about! Well done.

Top Shots.
Paul
Quote:
Originally Posted by Tilt View Post
Woohoo! Sensational...

By the way, the image without the intermediate stage re-entry is great too, I see you have knocked it back to f/5.6. Looks sharp, what are your thoughts on the difference between f/4 and f/5.6? I seem to be able to get a slightly sharper image from my 70-200 if I stop it down to f/4.

Michael.
Cheers Guys,
"LUCK be a lady tonight" eh!?
f4 v's f5.6 - not too sure, still experimenting. That said, I always run a star minimization action on all my pics anyway so perhaps f8 is looking good
Cheers
Doug
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  #5  
Old 28-09-2008, 10:18 AM
arkle (Steve)
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Absolutely amazing Doug!!

By the way, I can't remember whether you said you had the IS or non-IS 70-200mm lens but there is an excellent lens test site www.photozone.de that does professional tests of most lenses.

The results for the IS version are here

http://www.photozone.de/canon-eos/19...review?start=1

and gives the centre resolution, edge resolution and chromatic aberration figuresfor the lens at different focal lengths and apertures. At 200mm it looks like f/5.6 is the way to go.

Cheers,

Steve
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  #6  
Old 28-09-2008, 10:21 AM
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dugnsuz (Doug)
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Quote:
Originally Posted by arkle View Post
Absolutely amazing Doug!!

By the way, I can't remember whether you said you had the IS or non-IS 70-200mm lens but there is an excellent lens test site www.photozone.de that does professional tests of most lenses.

The results for the IS version are here

http://www.photozone.de/canon-eos/19...review?start=1

and gives the centre resolution, edge resolution and chromatic aberration figuresfor the lens at different focal lengths and apertures. At 200mm it looks like f/5.6 is the way to go.

Cheers,

Steve
Non IS version Steve - wanted it primarily for Astro work so IS wasn't needed.
Cheers
Doug
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  #7  
Old 28-09-2008, 10:28 AM
arkle (Steve)
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Quote:
Originally Posted by dugnsuz View Post
Non IS version Steve - wanted it primarily for Astro work so IS wasn't needed.
Cheers
Doug
Cool, the results for that lens are here

http://www.photozone.de/canon-eos/19...review?start=1

It looks like, at 200mm, it's sharpest in the centre at f/5.6, but slightly sharper around the edges at f/8. I think I'd be going with f/5.6!

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Old 28-09-2008, 10:38 AM
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Gee Doug that is such a lucky shot, it is probably the only one in existence, maybe the Russians will pay big money for it, and by the way the image with out the fire ball is a beauty as well, nice going mate.

Leon
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  #9  
Old 28-09-2008, 11:30 AM
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dugnsuz (Doug)
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Gee Doug that is such a lucky shot, it is probably the only one in existence, maybe the Russians will pay big money for it, and by the way the image with out the fire ball is a beauty as well, nice going mate.

Leon
Cheers leon.
And to think I was cursing when I saw that big white track on the subs!!

Doug
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  #10  
Old 28-09-2008, 11:36 AM
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Who needs a motion detector? Beautiful widefield. The balance between the dense background and the nebulae seems just right at that aperature.
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  #11  
Old 28-09-2008, 11:37 AM
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Matty P (Matt)
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Amazing capture Doug, talk about being in the right place in the right time. I really like the first image with the LMC in the background with the fire ball in front of it.

The last image without the white streaks is lovely as well.

Very well done.
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  #12  
Old 28-09-2008, 12:44 PM
Hagar (Doug)
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Who's a lucky boy.. I didn't even see a thing. Great luck you had the camera imaging at that time. A real winner.
Congratulations Doug.
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  #13  
Old 28-09-2008, 04:15 PM
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iceman (Mike)
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Amazing work, Doug! A great image on its own, and with the fireball, even better!
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  #14  
Old 28-09-2008, 06:24 PM
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RB (Andrew)
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As Mike said it's a very fine image just on it's own but with the re-entry it's a unique capture indeed.
A very lucky shot Doug, good timing mate, well done.
The final LMC image is fantastic.

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  #15  
Old 28-09-2008, 06:30 PM
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koputai (Jason)
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Damn! I spent a couple of hours visual on the LMC that night, but didn't start until 2:30am! Fantastic to see so many tiny trail in the shot!

Cheers,
Jason.
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  #16  
Old 28-09-2008, 06:37 PM
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dugnsuz (Doug)
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Thanks all
Doug
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  #17  
Old 28-09-2008, 08:45 PM
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Amazing capture Doug.

That's funny as I was just thinking last Friday night that I have yet to see some spectacular thing like that given the number of hours I have spent out in the night with this hobby.

Next time!

Greg.
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  #18  
Old 28-09-2008, 09:19 PM
jase (Jason)
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Impeccable timing Doug. Well done. LMC looks a treat too.
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  #19  
Old 28-09-2008, 09:55 PM
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marc4darkskies (Marcus)
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Verrrry cool!! Now, go buy a lottery ticket!

Cheers, Marcus
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  #20  
Old 28-09-2008, 10:14 PM
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dugnsuz (Doug)
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Quote:
Originally Posted by gregbradley View Post
Amazing capture Doug.

That's funny as I was just thinking last Friday night that I have yet to see some spectacular thing like that given the number of hours I have spent out in the night with this hobby.

Next time!

Greg.
Quote:
Originally Posted by jase View Post
Impeccable timing Doug. Well done. LMC looks a treat too.
Quote:
Originally Posted by marc4darkskies View Post
Verrrry cool!! Now, go buy a lottery ticket!

Cheers, Marcus
Thankyou Gents
Nice to get lucky once in a while!
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