I had the camera's ISO at 400 the other day and the camera said there was room for 38 more photos on the SD Card. Changing the ISO to 100 allowed for 41 photos to be taken. Why should that be the case?
NeoDSLR Senior Member 297 posts Joined Jan 2010 Location: UK More info | Jan 25, 2010 09:59 | #1 I had the camera's ISO at 400 the other day and the camera said there was room for 38 more photos on the SD Card. Changing the ISO to 100 allowed for 41 photos to be taken. Why should that be the case? .
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yogestee "my posts can be a little colourful"  More info | Jan 25, 2010 10:02 | #2 NeoDSLR wrote in post #9466616  I had the camera's ISO at 400 the other day and the camera said there was room for 38 more photos on the SD Card. Changing just the ISO to 100 allowed for 41 photos to be taken. Why should that be the case? Yep,,always.. Jurgen
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Brikwall Senior Member 840 posts Likes: 1 Joined Apr 2007 Location: Atlantic Canada More info | Jan 25, 2010 10:10 | #3 The higher the ISO, the larger the file size and, therefore, the fewer images for an allotted space. Not sure why but my guess would be that higher ISO images contain more noise, and thus more information, than lower ISO pics. Dan
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Dunedan Member 84 posts Joined Nov 2009 Location: Southfield, MI More info | Jan 25, 2010 10:39 | #4  Permanent banBrikwall wrote in post #9466666 The higher the ISO, the larger the file size and, therefore, the fewer images for an allotted space. Not sure why but my guess would be that higher ISO images contain more noise, and thus more information, than lower ISO pics. That is pretty much the case. It can compress less with more noise (even lossless compression).
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egordon99 Cream of the Crop 10,247 posts Likes: 3 Joined Feb 2008 Location: Philly 'burbs More info | Jan 25, 2010 12:37 | #5 Brikwall wrote in post #9466666 The higher the ISO, the larger the file size and, therefore, the fewer images for an allotted space. Not sure why but my guess would be that higher ISO images contain more noise, and thus more information, than lower ISO pics. Yep, noise is random, and random information does not compress well.
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