some shots from 13th Sept 2009

John O'Mahony · Post by **John O'Mahony** » Mon Sep 14, 2009 11:30 am

I managed to take some shots last night (took Monday off from work so I could stay up late!!)
All of the shots were taken with a Canon 450D (unmodded with cls filter) through a WO Megrez 72 refractor piggybacked on a CGE11. All shots are unguided. Stacked in DSS and levels and curves in Gimp 2.0.
The processing is very crude so please forgive some of the images. The North American nebula came out much better than I expected for such a small instrument and an unmodded camera.

M33 5x 5 minute subs

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Veil nebula wihes broom) 6 x 5 minute subs

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North American nebula and the pelican 9 x 5 minute subs

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M31 Andromeda galaxy 9 x 5 minute subs

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Double cluster in Perseus. 4 x 2 minute subs

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Conan Mc Donnell · Post by **Conan Mc Donnell** » Mon Sep 14, 2009 5:08 pm

nice shots, i presume the cls gave andromeda that greenish hue.

Dave Lillis · Post by **Dave Lillis** » Mon Sep 14, 2009 9:08 pm

very nice John, the veil and andromeda are my favourites.

John O'Mahony · Post by **John O'Mahony** » Tue Sep 15, 2009 6:59 am

Conan Mc Donnell wrote:nice shots, i presume the cls gave andromeda that greenish hue.

The CLS filter tends to give a greenish/ blue hue to some objects. It is only a problem on large diffuse objects like large galaxies where there is insufficient light to adjust the colour balance using software without losing the object. On bright galaxies it is not a problem.

Conan Mc Donnell · Post by **Conan Mc Donnell** » Tue Sep 15, 2009 2:38 pm

i really don't mind these colourations. it gives great depth and detail

Dave Lillis · Post by **Dave Lillis** » Tue Sep 15, 2009 7:47 pm

You could always grayscale the image if the colour bothers you, make it black and white.

Frank Ryan · Post by **Frank Ryan** » Tue Sep 15, 2009 8:06 pm

Nice shots John.