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JimothyC

M45 Pleiades / Merope Nebula

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The Pleiades have always been one of my favourite objects,  and since I got into astronomy and astrophotography earlier this year it's been right at the top of my list of targets.  Last nights beautifully clear night with no moon gave me my first chance to have a go at it. I had to wait till about 1am for it to clear a tree and for my neighbour to turn off his new and alarmingly moon like led outdoor lights. Looking forward to capturing more data over the coming winter. 

This taken using a Nikon D7500  with an Altair Starwave 70ED mounted on an iOptron CEM25P.  I've used the Altair 1.0 flattener and a Baader Neodymium filter.

30 x 180s @ iso800, wtih darks, flats and bias frames. Stacked in DeepSkyStacker and then tweaked, stretched and prodded in Photoshop.  

Feedback, questions and particularly, constructive criticism more than welcome.  I've added the original autosave.tif (195Mb) in case anyone else wants to have a fiddle with the raw data. 

Cheers

Jim

 

M45.jpg

Autosave.tif

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Looks like you have some nice data there. I think you could go to levels and reduce the blue channel only. Then you could try selective colour and reduce the cyans.

I had a quick play with the jpg.

M45.jpg.200f53de51e36d0c40751649e7b60e9a.thumb.jpg.604da1ef3e3afc7ec55d76ec241dedeb.jpg

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Very nice image with smooth nebulosity.  You have some blue halos.  They aren't easily got rid of and you can make things worse in trying!  One simple method is to use "replace colour" click on one of the halos and feather so you have all the halos and nothing else.  You can then play around with saturation and luminance to suit.  Aim to underdo or you will end up with ugly grey halos.  Alternatively do nothing at all and enjoy what is a fine image!!!!

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7 hours ago, MartinB said:

Very nice image with smooth nebulosity.  You have some blue halos.  They aren't easily got rid of and you can make things worse in trying!  One simple method is to use "replace colour" click on one of the halos and feather so you have all the halos and nothing else.  You can then play around with saturation and luminance to suit.  Aim to underdo or you will end up with ugly grey halos.  Alternatively do nothing at all and enjoy what is a fine image!!!!

Thanks, any idea where the halos are coming from? Do you think it the Baader Neodynium filter? Or is it just the bright stars getting over exposed? 

 

8 hours ago, Allinthehead said:

Looks like you have some nice data there. I think you could go to levels and reduce the blue channel only. Then you could try selective colour and reduce the cyans.

I had a quick play with the jpg.

M45.jpg.200f53de51e36d0c40751649e7b60e9a.thumb.jpg.604da1ef3e3afc7ec55d76ec241dedeb.jpg

Thanks for that. I think the screen on laptop needs calibrating. I didn't realise the background was so blue to start with. Yours looks much better thanks. 

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