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Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon Coolpix Users Group (Public) topic #166
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Subject: "coolpix 990 - problems with long exposure (new URL)" Previous topic | Next topic
jem59uk Basic MemberSun 10-Jun-01 03:31 PM
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"coolpix 990 - problems with long exposure (new URL)"



          

I have recently had to take some images using a 4 or 8 second exposure. I'm getting poor results due to speckled dots all over the picture. Has anyone else had similar results with very long exposure times.

example at

http://web.onetel.net.uk/~jeremyscott/990.htm


  

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AlanC Basic MemberSun 10-Jun-01 03:45 PM
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#1. "RE: coolpix 990 - problems with long exposure (new URL)"
In response to Reply # 0


GB
          

The noise you're seeing is what is normally referred to as 'hot pixels' and is common to all digital cameras to a greater or lesser degree. It typically shows up at exposures of 1 to 2 seconds or more.

There's an explanation of the different types of noise you can get in digital images at http://www.dpreview.com/learn/Glossary/Digital_Imaging/Noise_01.htm and details of a method to help reduce 'hot pixel' noise (assuming you have a copy of Photoshop or some other image editing software that implements layers) at http://www.dpreview.com/learn/key=noise+reduction

Alan.

  

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Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon Coolpix Users Group (Public) topic #166 Previous topic | Next topic


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