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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 17 Sep 2013 (Tuesday) 20:21
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Struggling with Noise and Lighting in RAW

 
rpmaurer
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Sep 17, 2013 20:21 |  #1

Ok, so I have these images of the milky way, the ones with good lighting have terrible noise and the ones with no noise are too dark (I think?). Not good with tonal curves, and post-processing... suggestions?

Photos
ISO6400 and 30s f3.5 10mm

IMAGE: http://i40.tinypic.com/33c9d0g.jpg

ISO6400 and 30s f3.5 10mm
IMAGE: http://i42.tinypic.com/25k0pc3.jpg

ISO3200 30s f3.5 15mm
IMAGE: http://i43.tinypic.com/295wys7.jpg

Help? :D :rolleyes:

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rpmaurer
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Sep 17, 2013 20:22 |  #2

These are all SOOTC

Sorry, I didnt realize the pictures would be so big, thought they were smaller :(


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drvnbysound
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Sep 17, 2013 20:45 |  #3

That's what I would expect at ISO6400.

Can you lower your ISO and use a longer shutter duration (blub mode)?


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rpmaurer
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Sep 17, 2013 20:47 |  #4

Stars start to blur :(


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drvnbysound
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Sep 17, 2013 20:56 |  #5

That's what I figured, but I don't shoot astronomy often enough to know for sure, so I had to ask.

Unfortunately, unless you get faster glass, you don't really have too many options. The EXIF data was stripped - do you know what focal length these were shot at?


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Titus213
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Sep 17, 2013 21:12 |  #6

Not sure I see a big issue here. In fact after some processing on the last one I like it.

Your option is to get an f2.8 lens which would bump the light a bit.

I would push the processing and see what develops.


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tonylong
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Sep 17, 2013 21:28 |  #7

I'll just jump and let the OP know:

Your pics are beyond the POTN size limit of 1024 pixels at the longest dimension!

So, to keep a mod from taking the shots down, resize your pics, delete them from the post and repost them at the proper size!


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drvnbysound
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Sep 17, 2013 21:43 |  #8

Titus213 wrote in post #16305320 (external link)
Not sure I see a big issue here. In fact after some processing on the last one I like it.

Your option is to get an f2.8 lens which would bump the light a bit.

I would push the processing and see what develops.

I was thinking that he may be able to go less than that...

Could possibly get away fairly cheap with a nifty fifty:
http://www.bhphotovide​o.com …Normal_EF_50mm_​f_1_8.html (external link)

That would net a 2-stop difference from f/3.5 and allow the adjustment from ISO6400 to ISO1600.


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tonylong
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Sep 17, 2013 22:35 |  #9

I'd say the OP would be well-advised to post in the Astronomy and Celestial Talk sub-forum:

https://photography-on-the.net/forum/forumdis​play.php?f=126


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tim
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Sep 17, 2013 23:40 |  #10

A faster lens would help a bit and dof probably wouldn't be a problem. You could turn on "high iso noise reduction" in your camera, which uses black frame noise reduction (ie shoots a second frame and subtracts noise). Otherwise a camera with less high ISO noise may be your only options.


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Titus213
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Sep 18, 2013 01:25 |  #11

Having done some reading on this (rather than first hand experience) the longer your focal length the shorter your shutter speed has to be to prevent star trails. From what I've read the 10mm lens would increase your length of exposure by more than a few seconds. Sounds like a great experiment.

The suggestion to post in the Astronomy and Celestial Talk sub-forum.


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tonylong
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Sep 18, 2013 01:45 |  #12

By the way, getting good star shots and at the same time getting foreground things "lit" (as in the trees or anything else) is, well, challenging. You need a light source for the foreground, or else you need to do multiple exposures and blend them in post-processing!


Tony
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rpmaurer
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Sep 18, 2013 05:50 as a reply to  @ tonylong's post |  #13

Thanks guys, I will resize those images. The focal length was 10mm, f3.5 was as far open as I could get. I have a 50mm and am going to try it soon. Unfortunately I am not the greatest post-processor in the world (quite terrible honestly). So I am not sure where I should even start. Also, I am going to post this in the Astronomy section...


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Struggling with Noise and Lighting in RAW
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