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08-17-2008, 03:27 PM   #1
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Newbie with a new K100D Super.

My K100D is less than a week old. I've changed very little so far (ISO, Av MF SR etc) and a total of 80 exposures (none worth keeping).

I've not changed the 'resolution' from the default setting (not certain I know which menu - ah, just checked 'menu' and it says 6M in Recorded Pixels and Quality Level ***.

Now, the JPG images on the SD memory card range from 2 to 4 MB.

Can anyone explain?

Am I being cheated?

08-17-2008, 03:52 PM   #2
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hello there......
I have a k100DS too and my file sizes also range from 2-4 mb depending on the photo........
what exactly u mean by being cheated........
btw, r u in newcastle, pa?
08-17-2008, 03:53 PM   #3
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File sizes vary with the scene more detailed scenes are bigger.
I use raw on my super and they are about 10 MB and after processing most are 2-4 MB
hope this helps
08-17-2008, 04:03 PM   #4
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QuoteOriginally posted by aamir515 Quote
hello there......
I have a k100DS too and my file sizes also range from 2-4 mb depending on the photo........
what exactly u mean by being cheated........
borno seems to have answered why the file sizes are not 6MB

QuoteOriginally posted by aamir515 Quote
btw, r u in newcastle, pa?
Newcastle, England (United Kingdom aka Great Britain)

08-17-2008, 04:52 PM   #5
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Ummmm the 6M in the menu refers to the number of pixels recorded on the sensor... ie a 6 megapixel camera has 6 million (roughly) pixel sites that record data.

It has nothing to do with it saving a 6MB image file.

The reason the size of the file varies is that JPEG is a compressed file and depending on what blocks of colour are in the image it will be bigger or smaller. The more varied the colour range in the image, the bigger the resulting compressed JPEG.

To see what I mean, take a photo of something with one of the primary colours dominant ie red. You will notice the files size will be small.
08-17-2008, 07:20 PM   #6
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QuoteOriginally posted by G-CPTN Quote
borno seems to have answered why the file sizes are not 6MB
well, unlike others, pentax is a pretty honest company
08-17-2008, 11:08 PM   #7
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RAW file sizes are mostly the same, JPEG images vary in size due to complexity of information that needs to be compressed.

Complicated elements in image = larger JPEG
Simple elements in image = small JPEG
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