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Orion's Belt & Sword: great mosaic in H-alpha

Posted: Fri Feb 11, 2011 9:54 pm
by Danilo Pivato
Hi all,

a photomosaic consisting in 17 shots that show the central
part of the constellation of Orion.

The mosaic measures approximately: 9°x8° (6464x5860 pixels)
and was completed in 21 nights.

The total time exposure of all frames is 76.5 hours

The equipment is Telephoto Nikkor 300mm f/2,8 @ f/4;
CCD: SBIG ST-10XME with H-alpha filter.

The location is my balcony observatory in Rome: ... p/2009.htm

The mosaic is here: ... mosaic.htm

Best regards,

Danilo Pivato

Posted: Fri Feb 11, 2011 10:06 pm
by David Frydman
That is a nice photo,
Regards, David

Posted: Fri Feb 11, 2011 10:21 pm
by Brian
Breath-taking detail 8) I love it!


Posted: Sat Feb 12, 2011 5:45 am
by Davej

That is a splendid mosaic Danilo, some great detail there.

All the best

Posted: Sat Feb 12, 2011 10:48 am
by smerral

Posted: Sat Feb 12, 2011 3:25 pm
by Danilo Pivato
Thank you!

Danilo Pivato

Posted: Sat Feb 12, 2011 10:00 pm
by Ender Of Days
Shame its not in colour :D

That has to be the finest image of that region Ive ever seen,totaly an awesome image,

Well done that man :)


Posted: Sat Feb 12, 2011 10:14 pm
by David Frydman
It is a wonderful photo.
There are two questions I have.
I see no diffraction spikes around bright stars at f/4. I presume the Nikon lens has either 9 iris blades or shaped iris blades to give a circular aperture.
Also the off centre images of the brighter stars in various locations is presumably a result of the mosaic nature of the photo.
In a single photo the off centre bright stars would congregate at the edges.

The detail and contrast and extent of the photo is wonderful.

Regards, David

Posted: Sun Feb 13, 2011 9:49 am
by mike a feist
A really great photo........I disagree however that "pity it was not in colour" .........the term "gilding the lily" comes to mind.....mike

Posted: Tue Feb 15, 2011 3:13 pm
by Vega
Stunning detail in there. Thanks for sharing. Loving the obsy and location too .. im not jelous.. much :shock:

Posted: Thu Feb 17, 2011 9:56 am
by pastafarianpriest
Absolutly gorgeous!

Posted: Thu Mar 03, 2011 8:32 pm
by davidm61

Many thanks for sharing such a detailed and simply beautiful study of of a part of Orion. Breathtaking!!!