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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial
Thread started 12 Jun 2016 (Sunday) 09:42
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Deep sky attempts: M13 and M57

 
mynameisjeff
Mostly Lurking
17 posts
Joined Dec 2015
May 07, 2017 10:46 |  #16

This was my first time attempting to photograph M13! I think it turned out alright, but you can't see enough stars. Any suggestions?

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andicus
Member
187 posts
Joined Aug 2009
May 07, 2017 19:34 |  #17

It looks like you posted a jpeg? You should work with a raw image. Looking at yours and trying to adjust the levels, there are a lot of compression artifacts.

It also looks like you started to get some trailing, as well, so I'm guessing you're not using a tracking mount. That limits how much data you can gather with a long exposure.

One thing you could try is increasing your ISO a bit. I'm not familiar with your camera, so I don't know how that will affect noise in your images.

You didn't say what you used to shoot this, but I'm assuming some sort of scope, sine the EXIF info doesn't indicate a focal length for your lens.


Canon EOS 7D, EOS Digital Rebel XTi / EOS 400D / Kiss Digital X | Canon EF 50mm f/1.4 USM, EF 70-200mm f/2.8L USM, EF-S 55-250mm f/4-5.6 IS |

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SiriusDoggy
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Joined Aug 2006
May 08, 2017 21:31 |  #18

Take 100 shots just like this. RAW.
Then download a neat little free program called DeepSkyStacker. You can find videos on YT on how to use it.


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andicus
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Joined Aug 2009
May 08, 2017 21:53 |  #19

Good point! I didn't even think to mention DSS.


Canon EOS 7D, EOS Digital Rebel XTi / EOS 400D / Kiss Digital X | Canon EF 50mm f/1.4 USM, EF 70-200mm f/2.8L USM, EF-S 55-250mm f/4-5.6 IS |

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mynameisjeff
Mostly Lurking
17 posts
Joined Dec 2015
May 13, 2017 15:54 |  #20

Hello and thanks for the feedback, I am still new to astrophotography. I have heard of DSS from other people for stacking. What will 100 more images do? Will it make the images like you see online, where there are thousands of images?
Thanks a lot, because I am new to this type of photography.


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legoman_iac
Senior Member
282 posts
Joined Nov 2009
Sydney
May 14, 2017 15:30 as a reply to mynameisjeff's post |  #21

Stacking photos gives you a cleaner image, as in, less digital noise. This is more noticeable when you start adjusting your image and tweaking the levels/curves/brightne​ss etc.

100 images is lots ... try even just 20-30 to start with. Also try ISO 800 and ISO 1600 as an experiment, even higher if you like and see how far you can push your camera.

Once you start stacking, some noise is ok as you'll get rid of it with the clean up.

- Daniel

P.S Great start by the way!


2x 50d: with 17-85mm f4-5.6, 100mm Macro USM, 50mm f1.8, 2x Sigma 30mm f1.4, 55-250mm (kit lens), Canon 100-400mm L, Tamron 200-400mm f5.6, Samyang 8mm. 480mm refactor with HEQ5. Home made beamsplitter stereo rig.

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Deep sky attempts: M13 and M57
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