Cygnus Wall..this time a close up!

[Elio]

Hi guys
here me again to share the results of the last clear night here in Italy, despite the moon is a bit intrusive.

Is taken from my backyard in Fara Sabina, 20 miles north Rome, SQM around 19.5 :help:

Image unpretentious, poor integration and a tad out of focus :foreheadslap:

Eos60D_CDS and RC8@f8 on Avalon M-Uno mount using idas d1 clip-on filter, 11x900s 1600iso subs @-16° autoguiding with a standalone Lacerta MGen.

Hi-res version here: http://www.astrobin.com/100215/

I hope you enjoy and, as ever, comments are welcome ;)

Cheers,
Elio

[gregbradley]

That turned out very well despite your troubles.

Greg.

[David Fitz-Henr]

That's not a bad image Elio, we don't see many of these northern objects down under :thumbsup: To me though it looks more like a collimation issue rather than focusing; the stars look reasonably tight in the bottom right area, but show signs of collimation problems in the other corners.

[strongmanmike]

Ah imaging under less than ideal conditions Elio :shrug:...now why would you do that :question: bloody Roma ...and moon:lol:

I agree with David but at least you got an image :thumbsup:

Mike

[Elio]

Thank you Greg ;)



Thank you David, me too, that's the sharing of night sky's ;)
I'm sure the problem was focus, I tried to better with processing...and make it worth in the corners
Here the same configuration in focus, take a look ;)
http://www.astrobin.com/95420/G/
Could you say this is a miscollimated optic? :welcome:


:lol:



Indeed, never mind, I took an image anyway... thanks you too :thumbsup:

[Regulus]

I don't recall having ever seen a photo of this before. Really happy to though and this is a great introduction.
Even tho u say
It is a nice image and I hope to see more of it if you get it again more to your own satisfaction.
Trevor

[Paul Haese]

Looks good Elio. Perhaps using a focusing routine will help a little. Collimation might be out but not by much in my opinion.

[David Fitz-Henr]

Hello Elio, the collimation looks good in your M13 image, but there definitely appears to be a slight collimation problem with the Cygnus Wall image. Look at the corners of the image:
Upper left: stars are elongated radially from the centre of the frame.
Lower left: stars are elongated in a horizontal direction.
Upper right: stars are slightly elongated radially from the centre.
Lower right: stars are quite good.

So, different elongations in the corners is a tell-tale sign of mis-collimation, although if you don't use a field flattener this will also cause similar issues in the corners (though they would look similar in each corner if collimated).

[Elio]

David you are right about corners but out of foucus make it worse... and this is a little cropped area because dithering... the collimation is the same of M13, as well, the entire OTA is still on the mount ;)



Thank you Paul, the problem with focusing because I had turned angle of the camera for composition, I should have refocusing after rotation :shrug:
I agree about collimation, not perfect but enjoyable when right "in focus" :thumbsup:

[Elio]

Thanks Travor, I've missed your commento, I'm so sorry... I'll try soon :thumbsup:

here you can find a widest image of this spectacular area :-)
http://www.iceinspace.com.au/forum/showthread.php?t=121833