Rosette Nebula NGC 2244

17 300 sec ISO 800 exposures 600 mm focal length f/7.5 Canon 20Da camera

Posted by Terry Arnold on Wed, 01/24/07 22:34
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Comments by Jan Bjorklund on Wed, 01/24/07 22:41

Am I reading the exposure right... 17 at 300 seconds? Well the Rosette Nebula stands out strongly in the resulting image... with the red coloring standing out strongly set against the darkness of the cosmos (especially when set against a black background). Striking image!

Comments by Steve Owen on Wed, 01/24/07 23:10

WOW! Great image!

Comments by Terry Arnold on Thu, 01/25/07 04:12

Yes you reading the exposure correctly. There is 85 minutes of exposure time in this image. I had even more exposures, but they all had problems. I want try this with 600 sec exposures to get even more detail. I will do this when I get my guiding equipment working better and I have a new moon. This was shot with a 83% moon.

Comments by Kenneth Heffernan on Thu, 01/25/07 05:31

Stunning image well done

Comments by Ruth Rittichier on Thu, 01/25/07 09:50

Very impressive image. Well done!

Comments by Linda Frey on Thu, 01/25/07 09:57

Well done!

Comments by Dave Lavash on Thu, 01/25/07 12:56

Very visual. I can't begin to imagine the technical problems of getting an image like this. Don't things move around a lot in 85 minutes?

Comments by Christopher Azzopardi on Thu, 01/25/07 13:39

Quite an unusual photo. Very impressive.

Comments by Maria Salvador on Thu, 01/25/07 14:13

Very impressive, indeed!

Comments by Garry Schaefer on Thu, 01/25/07 16:21

Wonderful! First image I can recall seeing from the 20Da. The stars are quite crisp. You must have a sturdy tracking set up. Next you'll be competing with the Hubble. I look forward to seeing more. That will augment my first Internet stop each day - to the Astronomy Picture of the Day (APOD) site. :-)

Comments by Alias on Thu, 01/25/07 16:27

Wonderful image ...

But the real wonder is the idea/concept/technique which makes such faint wonders
available to average folks with only consumer level equipment.

The only thing likely to not be in the moderately well equipped photog's inventory is a
clock drive, and they are becoming lighter, cheaper, better, and more available.

I'd love to know the details of your innovative process, but I'd guess you aimed for the
same coordinates for successive exposures, adjusted contrast, etc. (perhaps by batch
processing), made each a layer, and precisely registered them, either manually or through
software, but please do share the actual details.

Did you dream this up yourself ?

In any event, well done !

Comments by Qiang Li on Fri, 01/26/07 00:15

It is indeed wonderful! It takes a true photographer's skill and patience to get such a stunning image.

It would be interesting to see some photos of the equipment that you use.

Comments by Deja on Fri, 01/26/07 07:10

just stunning!

Comments by Pietro Cecchi on Fri, 01/26/07 07:23

Hi Arnold,
you got really a stunning result!
(would be very nice also the M51 blue galaxy... having the time...)

Comments by Michael Hibbitts on Fri, 01/26/07 12:42


Comments by Rick Longworth on Fri, 01/26/07 18:07

Exciting shot and method.

Comments by Amelia Pearn on Fri, 03/23/07 07:22

Nice! How do you keep the stars from trailing?

Comments by Amelia Pearn on Fri, 03/23/07 07:23

Nice! How do you keep the stars from trailing?

Comments by Maryluvspics on Tue, 05/22/07 21:12

Hey its a great shot! Good color and crispness.I would have preferred to see it centered a little bit more. Maybe a crop who help.

Comments by jonah on Wed, 08/15/07 18:45

Lovely picture, I could comment on the framing at the top but that would just be picky :-)

I'd love to be able to take pictures like this, but living in London it's hard to see how I'd manage one 5-minute exposure without some errant light spoiling my picture, let along 17 of them back-to-back.

I'm presuming you used an equatorial mount for this - would you mind giving some indication what sort of money it takes to get hold of a half-way decent one? I might just take my big lens out into the woods one night if it's not silly money.

Comments by Pietro Cecchi on Fri, 03/28/08 16:15

Wow... such a clear sky...
It's beautiful, Terry...
so beautiful... :)

Comments by Pietro Cecchi on Fri, 03/28/08 16:21

Wow... such a clear sky...
It's beautiful, Terry...
so beautiful... :)