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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 05 Mar 2010 (Friday) 21:48
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1st star trails, help appreciated!

 
ftblplyr46
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Mar 05, 2010 21:48 |  #1

Well I decided to go out in the back yard and give it a go. Kinda excited I got it, but then kinda disappointed with the results after seeing other photo's from people. So I think the orangish haze may be from when the back porch light was on at the start, and I turned it off after I opened the shutter. Other than that, I would greatly appreciate any tips you guys could provide. Was taken with my Canon Rebel XT, with the kit lens.

Iso - 400
Shutter - Bulb, ~10 minutes
f/stop - 10

IMAGE: http://farm5.static.flickr.com/4019/4410303788_8f3fec6617_b.jpg

Canon Rebel Xt, 17-55mm, 55-250mm IS, 50mm 1.8 -- Ohio Google Calendar (external link) -- flickr (external link)http://www.flickr.com/​wernerdi (external link)

  
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TheBigDog
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Mar 05, 2010 22:28 |  #2

I haven't done star trails myself, but I think you'll find better results by taking many 30 second exposures and stacking them rather than one long exposure, I think it would at least cut down the noise greatly.

Not a bad shot, at what focal length was that taken?


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ftblplyr46
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Mar 06, 2010 09:48 |  #3

TheBigDog wrote in post #9738328 (external link)
I haven't done star trails myself, but I think you'll find better results by taking many 30 second exposures and stacking them rather than one long exposure, I think it would at least cut down the noise greatly.

Not a bad shot, at what focal length was that taken?

I was right around the widest, prob around 18mm, if not 17.

Ill try the stacking thing next time, do you think I will get more of a black sky that way? Im satisfied with my first turn out, other than the sky not being black.


Canon Rebel Xt, 17-55mm, 55-250mm IS, 50mm 1.8 -- Ohio Google Calendar (external link) -- flickr (external link)http://www.flickr.com/​wernerdi (external link)

  
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tkerr
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Mar 06, 2010 10:09 |  #4

I usually use my my 18-55mm @ 18mm. and open up that f/stop to allow the light in, f/3.5 with that particular lens. ISO 1250 with my 50D.
Then take shorter exposures. 30 to 40 seconds is fine with just a few seconds between each shot. Then you can do it the hard way and use PS to stack them together making them into a single image with long star trails. or you can do it the easy way and use a nifty little program called Startrails (external link)


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macroshooter1970
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Mar 14, 2010 18:07 |  #5

I normally use around f4 and combine a bunch of 3 to 10 minutes exp. Just experiment and have fun. Nice go at it, keep it up.




  
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1st star trails, help appreciated!
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