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<blockquote data-quote="aroy" data-source="post: 304162" data-attributes="member: 16090"><p>One of the methods of doing away with in-camera noise reduction (and this seems to be confined only to CCD sensors), is to take a number of shots at shorter exposures, and then stack them. What this means is that instead of taking a 200 sec shot, take 10 20 sec or 100 2 sec shots, and then use program to merge them. Apart from the fact that this is used regularly by Astronomers, the advantage is that</p><p>. The noise decreases compared to long shots</p><p>. The sensor remains cooler, hence fewer hot pixels due to heat.</p><p>. Any object which intrudes in one frame (a plane or a meteorite) can be deleted by the software.</p><p></p><p>For this you will need a controller which can be programmed to</p><p>. Take a series of short exposures</p><p>. Wait for a fixed time</p><p>. Take another series</p><p></p><p>The easiest way is to use Digicam program in your laptop and camera connected by USB.</p><p></p><p>Some links.</p><p><a href="http://petapixel.com/2014/03/28/incredible-focus-stacked-time-lapse-video-coral-made-150k-raw-frames/" target="_blank">Incredible Focus Stacked Time-Lapse Video of Coral Made Up of 150K RAW Frames</a></p><p><a href="http://www.thisiscolossal.com/2013/04/smeared-skies-made-from-hundreds-of-stacked-photographs-by-matt-molloy/" target="_blank">Smeared Skies Made from Hundreds of Stacked Photographs by Matt Molloy | Colossal</a></p></blockquote><p></p>
[QUOTE="aroy, post: 304162, member: 16090"] One of the methods of doing away with in-camera noise reduction (and this seems to be confined only to CCD sensors), is to take a number of shots at shorter exposures, and then stack them. What this means is that instead of taking a 200 sec shot, take 10 20 sec or 100 2 sec shots, and then use program to merge them. Apart from the fact that this is used regularly by Astronomers, the advantage is that . The noise decreases compared to long shots . The sensor remains cooler, hence fewer hot pixels due to heat. . Any object which intrudes in one frame (a plane or a meteorite) can be deleted by the software. For this you will need a controller which can be programmed to . Take a series of short exposures . Wait for a fixed time . Take another series The easiest way is to use Digicam program in your laptop and camera connected by USB. Some links. [URL="http://petapixel.com/2014/03/28/incredible-focus-stacked-time-lapse-video-coral-made-150k-raw-frames/"]Incredible Focus Stacked Time-Lapse Video of Coral Made Up of 150K RAW Frames[/URL] [URL="http://www.thisiscolossal.com/2013/04/smeared-skies-made-from-hundreds-of-stacked-photographs-by-matt-molloy/"]Smeared Skies Made from Hundreds of Stacked Photographs by Matt Molloy | Colossal[/URL] [/QUOTE]
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