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question

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6 replies
Posted by MOSESCO on August 16, 2007 at 7:31 PM
whenever I try to take a time exposure on my Rebel XTI it takes as long as the exposure to record the imfo? So if I set the shutter for an hour long time exposure or more to capture the star trails when I release the shutter it takes an hour or more to record the info! Many times the battery dies before it's done recording, any one have experience with this. I wish I could upgrade to a better model but I have no money :biggrin:
Posted by Nat Coalson on August 16, 2007 at 7:38 PM
Sounds like Noise Reduction for Long Exposures is enabled. Go into the Menu (or Custom Function) and turn it off.
Posted by John Mumaw on August 16, 2007 at 8:28 PM
That's exactly right.
Go to Custom Function 2 and choose 'Off'. Your problem will be solved.
Posted by MOSESCO on August 16, 2007 at 11:28 PM
thanks got it now
Posted by Mel Ladewig on August 17, 2007 at 12:13 PM
At the same time, the dark frame subtraction noise reduction can be very helpful so you may want to remember to turn it back on at times.

Mel-
Posted by Nat Coalson on August 17, 2007 at 6:08 PM
Much better to do noise reduction in post processing, a la Noise Ninja or Noiseware etc.
Posted by Ken Wyatt on August 18, 2007 at 1:02 AM
Agree on the post-processing of noise. I use Neat Image quite successfully - especially for my large prints. It's like magic!

Ken