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Foto Fair Post your photos for friendly, non-critical feedback. This is the place to show pictures if you aren't yet ready for full-blooded critique, or simply want to share an interesting picture with other e-group visitors.

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  #61  
Old 7th October 2016
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Re: Astro Photos

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Originally Posted by birdboy View Post
Have you tried processing with Pixinsight on a stacked fits file (if that's possible) as I think all the specialist star processing tools work better on raw files that have not had any tweaking.

The greatest improvement I think we would get is when we can use our equipment under proper dark skies.

Pixinsight can load and process Fits, in fact thats its preferred default.

The only reason I used Tifs was so PS can handle them. PS does not recognise Fits at all, it can't load or even import them which did surprise me as they are the scientific worlds default file type.

I will definitely use them going forward and make sure all automatic balancing in DSS is switched off as you suggested.

The set of M33 raw ORF files I got came out some in landscape and some in portrait orientation because the camera went through the 45 degree point in taking the series of shots. The only way I could then get them all into the same orientation to stack was to load into Lightroom and then export as Tifs. The switch in orientation mid series made it more difficult.

I have no idea how I go from an ORF raw to fits file without going through Tif as an intermediate file format. Can it be done.?

I realise DSS does stack ORF raw files but it treats them as grey scale whereas tifs it treats as RGB.
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  #62  
Old 8th October 2016
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Re: Astro Photos

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The set of M33 raw ORF files I got came out some in landscape and some in portrait orientation because the camera went through the 45 degree point in taking the series of shots. The only way I could then get them all into the same orientation to stack was to load into Lightroom and then export as Tifs. The switch in orientation mid series made it more difficult.

I have no idea how I go from an ORF raw to fits file without going through Tif as an intermediate file format. Can it be done.?

I realise DSS does stack ORF raw files but it treats them as grey scale whereas tifs it treats as RGB.
I load my raw orf files from my E5mkii straight into DSS I think it may take care of your orientation problem as well because during stacking it should rotate the file to get star alignment. I had this problem early on now I turn the auto rotation off play back menu rotation set to off.

I have also noticed that DSS says it is threating them as grey scale but when you turn the background colour channels off I think the resultant image is a colour one as the histogram of the fits file shows RGB channels. When I have stacked raw orf images in DSS with background colour off although they were listed as grey scale during the stacking process the fits file when processed in StarTools showed the colour. There is something of an explaination in the DSS manual tecnical details its way over my head but I am happy that my raw files although it says grey scale are in fact colour.
http://deepskystacker.free.fr/englis...l.htm#rawdecod
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  #63  
Old 9th October 2016
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Re: Astro Photos

http://www.deepskycolors.com/books.html.
Ho hum...we can dream.

Also, is this thread a repository for astro photos and discussion or is it best to start a new thread for our own images?

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  #64  
Old 9th October 2016
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Re: Astro Photos

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Also, is this thread a repository for astro photos and discussion or is it best to start a new thread for our own images?

There wasn't a specific thread for astro shots and I so I started my own. I am very happy to open it up to anyone to share their astro shots as long as the administrators don't mind. The more the better so were can all share, critique and learn.
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  #65  
Old 9th October 2016
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Re: Astro Photos

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Not seen that one but its amazing. It takes a lot of practice to get shots like that plus good clear dark skies.

I see you are in Shetland I would have thought you would have some great dark sky locations.
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  #66  
Old 9th October 2016
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Re: Astro Photos

The sky isnt too bad but there are areas of light pollution that encroach on my images The main problem is the wind


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  #67  
Old 9th October 2016
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Re: Astro Photos

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I have no idea how I go from an ORF raw to fits file without going through Tif as an intermediate file format. Can it be done.?
Just been looking at Pixinsight and wonder why don't you stack your raw files in Pixinsight under Star Alignment? It has been said by some that Pixinsight has one of the best star stacking processes around.
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  #68  
Old 9th October 2016
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Re: Astro Photos

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Just been looking at Pixinsight and wonder why don't you stack your raw files in Pixinsight under Star Alignment? It has been said by some that Pixinsight has one of the best star stacking processes around.
The simple answer is I haven't got around to it yet. I have concentrated on learning the other features in Pixinsight and there are a lot.

On top of that DSS is so easy to use and its become my default. Its even better now you have shown me the best settings to use.

I am going to run the raw data again through Pixinsight from beginning to end and see where I get. I did have a quick play with the subframe selection script and that identified a couple of my frames that had issues.

My next target is going to be M101 the Pinwheel Galaxy when I get a chance.

Not sure how the EM5mk2 will handle nebula though so staying away from them for now, have you tried shooting one?

From what I have read people using Canon DSLRs who are serious astrophotographers get them modded and have the red filter removed especially to capture nebulosity which is mainly red.

No way am I doing that to my em5mk2.
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  #69  
Old 9th October 2016
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Re: Astro Photos

easiest way to check how your Camera handles nebulosity is to point it at Deneb If you get the North American Nebula you know it is fine. EM-5 mk I works

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  #70  
Old 9th October 2016
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Re: Astro Photos

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Originally Posted by wornish View Post
Not sure how the EM5mk2 will handle nebula though so staying away from them for now, have you tried shooting one?
I have tried several times to get images of the heart and soul Nebula but without any success. I am not sure if it is my frame data or processing that fails to see the nebula. I have put it down to too much sky pollution from where I am taking them.
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  #71  
Old 9th October 2016
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Re: Astro Photos

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Originally Posted by birdboy View Post
I have tried several times to get images of the heart and soul Nebula but without any success. I am not sure if it is my frame data or processing that fails to see the nebula. I have put it down to too much sky pollution from where I am taking them.
Think you might be right. In the post from Chris (crimbo) earlier he says he can get nebula from his location in Shetland which is almost a dark sky site.
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Old 10th October 2016
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Re: Astro Photos



Last night. EM-1 mkI, 40-150+ 1.4x 21x1 minute DSS, CO9, CS2
I used a daylight white balance but I am not sure with all the fiddling about that the colours are way off
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  #73  
Old 10th October 2016
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Re: Astro Photos

Very good detail captured especially in the galaxy arms. Like you say the colours seem strange, there is a lot of red. Did you capture raw or jpg?
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  #74  
Old 10th October 2016
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Re: Astro Photos

Raw capture straight in to DSS.
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  #75  
Old 10th October 2016
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Re: Astro Photos

ORF to FITS can be done with FITS Work and DCRAW
Though now I need to get FITS into CS 2

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