NGC 4945 and 4945A

[tilbrook@rbe.ne (Justin Tilbrook)]

Hi,

I enjoyed imaging this galaxy, it's a nice field but had a bit of trouble with the brighter stars in the field. It took a bit of time to tone down the bright blue rings around them, probably can do a bit better yet.

Telescope 8” f/4 astrograph on a HEQ Pro 5 mount, orion mini guider.
Unmodded Canon 1100D at ISO 800.
9 x 300 sec subs ISO 800,
21 dark frames, 16 flat frames and 11 bias.
Stacked in DSS and post process in Phototshop.
Cheers,

Justin.

[Astroman (Andrew Wall)]

Very nice detail there Justin, at least the blue halos don't distract you from the main objects. Colours look very nice.

[jjjnettie (Jeanette)]

You're on a roll too aren't you.
It's a great FOV isn't it.

Here's a bit of a fix for your pretty blue haloes.
Select the individual star and then feather it by 10 points. (select-modify-feather)
Then in curves, select the Blue channel, and apply the curve that I have shown in the photo. (image-adjustments-curves) Select the +eyedropper and click on the various shades of blue within the selection so you achieve a more even desaturation of the region.

You might want to experiment using the same process with "Saturation" and "Colour Balance" instead. Each tool gives a slightly different result.

[tilbrook@rbe.ne (Justin Tilbrook)]

Thanks Andrew and jj.

Originally Posted by jjjnettie

You're on a roll too aren't you.
It's a great FOV isn't it.

Here's a bit of a fix for your pretty blue haloes.
Select the individual star and then feather it by 10 points. (select-modify-feather)
Then in curves, select the Blue channel, and apply the curve that I have shown in the photo. (image-adjustments-curves) Select the +eyedropper and click on the various shades of blue within the selection so you achieve a more even desaturation of the region.

You might want to experiment using the same process with "Saturation" and "Colour Balance" instead. Each tool gives a slightly different result.

Thans foe the advice jj, I was sort of doing what you described but not in the right order.

Cheers,

Justin.

[Ross G]

Great galaxy photo Justin.

I love the composition.


Ross.