The Great Orion Nebula - 190 Minutes

Discussion in 'Astro Photography' started by Colorado CJ, Jan 7, 2019.

  1. Colorado CJ

    Colorado CJ Well-Known Member

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    I took this last night with my Stellarvue SV80 Access and Nikon D600. This is 31 frames at 300 seconds, 20 frames at 60 seconds and 30 frames at 30 seconds.

    I am not real happy with it, but it is better than my last photo of Orion. Can't seem to get the colors just right and the trap isn't as defined as I'd like.

    [​IMG]Orion 190 Minutes by Andrew Marjama, on Flickr
     
  2. AlanLichty

    AlanLichty Moderator

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    I will take your word for it on this being a flawed image - looks incredible to me.
     
  3. JimFox

    JimFox Moderator
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    Hey Andrew, like Alan this looks great to me. I only wish I could get something this good looking.
     
  4. Ben Egbert

    Ben Egbert Forum Helper
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    Like Jim and Alan, I have to take your word for it that it's not perfect. Looks stellar to me:cool:
     
  5. Mike Lewis

    Mike Lewis Staff Member
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    Andrew,

    This is a very nice result, and an obvious improvement in detail from your previous version(s). Because M42 is so bright many consider it an 'easy' target, but it is just that brightness that can make it challenging to capture and post process in a way that allows for display of both the bright and the dim portions of the region. A couple comments regarding your original comments:

    1) The dynamic range required to capture all the bright to faint details of M42 is very large, and I think it exceeds even the exposure range you have used here in your 3 stacks of data. Your 300 second images have done a great job of exposing a lot of the faint gas and dust structures both around the M42 Nebula and around the Running Man Nebula. But even using a 30 second subframe exposure you are still too bright for getting Trapezium core detail. I think you can get down to maybe 8 seconds, or perhaps even shorter, before you have really good separation of the inner Traezium stars, which are so much brighter in relation the the remainder of the nebula. Having said that, I think that such very high dynamic range treatments start to look less realistic than the result you already have processed and posted here. But perhaps worth collecting some more really fast exposure data and playing with that to see how you like the results.

    2) I do think your colors, particularly in the blues (as would typically show up in a reflection nebula like the Running Man) are lacking a bit here. It also seems like you have more noise than I would be expecting in an integrated stack of this duration. I think if there is a good color correction tool in the processing suite you use (I am only really familiar of how to do this in either Pixinsight or Lightroom) you might see if you can tweak that some more. And perhaps bringing down the background level just a little could mitigate some of the noise (if you do not have a good NR tools) while still preserving a lot of the fainter details you have so nicely captured in the result.

    ML
     
  6. Bob Denton

    Bob Denton Well-Known Member

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    This is great looking!
     

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