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FORUMS Photo Sharing & Discussion Astronomy & Celestial 
Thread started 31 Oct 2008 (Friday) 12:13
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M45 from Chiefland Florida.

 
markjpcs
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Oct 31, 2008 12:13 |  #1

IMAGE: http://www.pcsincnet.com/M45102608-1Rev3.jpg

Canon 50D
Astro-Physics 105mm APO f5.8
134 x 1 minute exposures stacked and median combined in Deep Sky Stacker.
10 dark frames median combined into a master dark and subtracted in Deep Sky Stacker.
Post Processing in Photoshop CS3

Astro-Photo Web Site. http://www.bigcigarast​ronomy.com (external link)

  
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ebann
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Oct 31, 2008 12:16 |  #2

:shock: :shock: :shock:


Ellery Bann
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Nighthound
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Oct 31, 2008 13:00 |  #3

Looking good Mark, wish I was there. I'm going to our dark site tonight on the ocean. Looking to get the California Nebula.

Hope you have a great time there.


Steve
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Celestron
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Nov 01, 2008 00:43 |  #4

Great shot ! You just need to edit that green background . WTG and thanks for posting !




  
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Adrena1in
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Nov 01, 2008 12:30 |  #5

Lovely. Try as I might I simply can't extract any of the nebulosity from my M45 photos, so I'm always impressed at shots like this.


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markjpcs
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Nov 02, 2008 00:02 |  #6

I toned down the Green curve a bit.

IMAGE: http://www.pcsincnet.com/M45102608-1Rev4Reduced1024.jpg

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Johnny9s
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Nov 02, 2008 01:38 as a reply to  @ markjpcs's post |  #7

The edit look great. bw!


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Celestron
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Nov 02, 2008 15:25 |  #8

Mark , this is more like what i was talking about with the green . On my computer it's a solid green background even in your re-edit . Hope you don't mind my reposting it . I had to reduce the file size also because of 150K being max for this section on image size .




  
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ebann
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Nov 02, 2008 16:52 |  #9

Where did the green cast come from?


Ellery Bann
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markjpcs
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Nov 02, 2008 17:50 |  #10

Ron,

Thanks it looks much better!

I see it now. It is more obvious on my laptop though.

What did you do to fix it? I just brought the green curve down a bit.

I'd like to apply your edits to the original tiff file.

Mark


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Nighthound
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Nov 02, 2008 18:38 |  #11

Mark,

I took a look at your image in Photoshop and a few things jumped out. The saturation level looks a bit high on my monitor so I backed it down a bit. Also the color balance was off so I tweaked it and raised the black point a bit to see if there was any faint detail being masked. Because this is a low rez JPEG I can't bring back what was lost in the original but take a look in the circle in this image and some detail was revealed even at this stage. These DSLRs are great but when it gets down to the faintest of details I find myself really working hard to retain it during the last stages of processing.

Hope you don't mind me tinkering and sharing some thoughts. Hope you had a great time at Chiefland.

IMAGE: http://i3.photobucket.com/albums/y67/Nighthd/Astrophotography/test/tst2/M45102608-1Rev3nh.jpg

Steve
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R ­ Hardman
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Nov 02, 2008 19:13 |  #12

Mark, love the details!


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Celestron
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Nov 03, 2008 08:28 |  #13

markjpcs wrote in post #6610623 (external link)
Ron,

Thanks it looks much better!

I see it now. It is more obvious on my laptop though.

What did you do to fix it? I just brought the green curve down a bit.

I'd like to apply your edits to the original tiff file.

Mark

Mark the first thing i do is open LEVELS and click the gray point dropper button , move the cursor over to a dark section of the image (Usually middle upper left hand section ) and right click . You will notice an overall change in the cover haze a picture has on it . This helps remove some false LP film but becareful cause it can also cause a sky change in color . Play with this before you save it to adjust it to your likings . As Steve mentioned he toned down the saturation and i agree it was a little too much but i didn't want to change too much in case you didn't like it but Steves version is better . Next i will check the histogram and see if things are still ok . Next i will make adjustments in VARIATIONS . If it looks ok i'll save a copy first and see how it looks when opened . If the background isn't dark enough for me then i'll use SELECTIVE COLORS and adjust Black point and maybe NEUTRALS point . Careful on the NEUTRALS tho cause one # too much can cause lost of detail and same as with the Black Point adjustments . One main thing i try to watch is to not disturb the Histogram very much . I have a hard time with this . Some times i knock it way out of whack and i'll have to start all over again . I never save any adjustments to the original image cause once saved you cannot go back to the original image and if you don't have a copy then your out of luck to start from scratch again :( .




  
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markjpcs
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Nov 03, 2008 12:04 |  #14

Thanks for the processing tips!

Here is my latest revision based on your (Ron and Steve's) advice.

IMAGE: http://www.pcsincnet.com/M45102608-1Rev5_72dpi_1024.jpg

I could play with this all day but I have real work to do. :lol:

It looks like I captured a faint galaxy to the right of M45! I love it when that happens! ;)

Astro-Photo Web Site. http://www.bigcigarast​ronomy.com (external link)

  
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ebann
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Nov 03, 2008 12:07 |  #15

markjpcs wrote in post #6615403 (external link)
Thanks for the processing tips!

Here is my latest revision based on your (Ron and Steve's) advice.

I could play with this all day but I have real work to do. :lol:

Niiiice!!! bw!


Ellery Bann
Fuji X100
6D | Rokinon 14 2.8 | 50 1.4
1D Mk IV | 24-70 2.8L | 70-200 2.8L IS | 135 2L | 400 5.6L

  
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M45 from Chiefland Florida.
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