M50. More Open Cluster Action

[MattJenko]

HEQ5, Skywatcher 80ED, Atik 414ex, RGB. 2 mins subs, 20 each channel. Slowly getting there I think. At least most of my subs were in focus this time:

[Starlight 1]

Yes I do like this, but can I ask ? you are useing a 80 ed but I can see blue round the Stars much like I get with my st, is it in the image processing that do this.

[MattJenko]

I have increased the saturation of the stars and the blue has come through around the edges of the blue stars, it doesn't appear on the redder, more orange stars. I am using filters so it is not blue CA fringing in the same sense that the achros scopes have.

[Starlight 1]

I have increased the saturation of the stars and the blue has come through around the edges of the blue stars, it doesn't appear on the redder, more orange stars. I am using filters so it is not blue CA fringing in the same sense that the achros scopes have.

Thanks Matt I did see your post reply , can I ask one more? do you use a Star mask and will it help in removing the blue round Stars .Save me starting a new post.

Thanks

les

[MattJenko]

Hi Les,

No I didn't use a star mask to isolate blue round stars, the only masking I did was to protect ALL the stars when reducing the slight red colour cast of the background and to do a different saturation curve on the stars themselves.

If you are using PixInsight like me, a star mask can certainly help with blue fringing specifically though, in that you can create a softened star mask, and then using PixelMath, you can subtract a tighter star mask and this will leave you a de-ringing type mask where the center of the star is protected, as is the background and you can minimize the effect of the blue halo specifically.

[lensman57]

That is a nice one Matt, very good colours and well spread out.

A.G

[toxic]

nice image Matt keep it up mate

[morimarty]

This looks a nice star cluster to image Matt you have done really well. funny I was just thinking how well your ed80 had done regarding the blue stars. was this at the native focal length?

[MattJenko]

Thanks Martyn. I am using the dedicated x0.85 reducer/flattener. In reality there is no real need to use it with my small CCD chip, but for me it actually moves the focus point inwards, so there are no tube extensions needed and also, everything screws in nicely, so its a pragmatic decision rather than a field of view or flattening one.