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From: "drbob" 
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Subject: Fw: Long exposures with a digital camera
Date: Wed, 14 Jul 2004 21:51:32 -0400
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I thought you might find this of interest, so I'm passing it along to 
you.It deals with taking long exposures with a digital camera, which 
most digital cameras really can't do well.


* Dave's Favorites: Faking Long Exposures With Image Stacker * 
The final frontier of digital photography: long exposures for night 
photography. There are any number of reasons why long exposures and 
digital cameras don't mix. First and foremost, most digital cameras are 
limited to a maximum of 8 seconds of total exposure time. More 
importantly, long exposures generate lots of digital noise that cloud 
your night photography with stray pixels of random color. 

TawbaWare's Image Stacker is a clever solution to this vexing problem. 
The program lets you combine a number of short exposures into a single, 
long-exposure photo. 

I tried Image Stacker and immediately fell in love. You simply drag a 
number of photos into the Image Stacker queue, choose from among five 
blending modes, then click Start. That's it; there are no complex 
controls or confusing settings. A few moments later, you get a simulated 
long exposure that rivals the sort of thing film cameras excel at. The 
various blending modes help you minimize digital noise and fine-tune the 
exposure of your final picture. You can try a series of pictures in all 
five modes to see which you like the best. 

You can use Image Stacker to photograph star trails in the night sky and 
light trails from moving cars, and to add an unearthly daylight glow to 
your night photos. 

Image Stacker costs $17 and is available from TawbaWare's site:
http://www.tawbaware.com/imgstack.htm 

If the thought of getting creative with your digital camera at night 
excites you, this is a must-have application. 
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