Star Storm

Discussion in 'General Gallery' started by invisible, May 24, 2008.

  1. invisible

    invisible Been spending a lot of time on here!

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    Bump to ask this question again (for everybody, but especially for those who have experience shooting star trails): Is there anything I should have done differently to achieve better results?


     
  2. chantal7

    chantal7 TPF Noob!

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    May I ask how long of an exposure you did? I forgot to put that in my previous post.
     
  3. invisible

    invisible Been spending a lot of time on here!

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    Sure. This one was a 10-minute exposure, f/4 at ISO 200. Make sure the sky is very dark before you shoot (i.e., after 11 PM) on a moonless night. It helps to drive out of town so the city lights don't make the sky lighter (I drove 100 km away from Winnipeg, to give you an idea).
     
  4. confucious

    confucious TPF Noob!

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    I just had a thought (took me awhile) - if you're worried about noise, why not try shooting at a lower ISO. You don't need the added exposure value it would give as you're leaving the shutter open for 10 minutes anyways. In my mind, raising ISO is a last resort in dark areas shooting handheld - it allows you to speed up your shutter to avoid shake. If your camera goes down to 100 or 50, they would both be better than 200.

    Won't make a huge difference, but may help :)
     
  5. chantal7

    chantal7 TPF Noob!

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    Okay, thank you. Another question, does any SLR camera do a 10 min exposure? I'm not familiar with that part of the camera. I know mine goes up to maybe a minute and that's it :O. I'm not sure if there's another way / setting to do that with.
     
  6. astrostu

    astrostu Guest

    I had that question, too, when just starting out. I saw that the camera I was after went up to 30-sec exposures and it also did "B" exposures. Eventually I found out that "B" meant "Bulb" which is where the camera will expose for as long as the shutter is depressed (or if using a remote, then until you press the remote again). It's a case of not knowing what you're looking for in terminology.

    So if your camera has a "B" or "bulb" setting for exposure "length," then yes.
     
  7. chantal7

    chantal7 TPF Noob!

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    Okay, I'll have to check it out. Thanks again! :sexywink::thumbup:
     
  8. molsen

    molsen TPF Noob!

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    a digital exposure of 10 minutes will always be REALLY noisy, regardless of the ISO setting, because the sensor gets hot.

    you should try doing a series of 1 minute exposures with a 5 sec. break in between each. then merge them all in photoshop. you'll have A LOT less noise this way
     
  9. astrostu

    astrostu Guest



    While what you said is not not true, it really depends upon the sensor and the outside temperature as to how much noise will be present in a 10-minute exposure. Yes, there should be ~10x more noise than in a 1-minute exposure. BUT, I've done 45-minute exposures with my Rebel XT (350D) and not had noise issues. The sky was a little bright, but not noisy.
     

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