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<blockquote data-quote="WayneF" data-source="post: 590964" data-attributes="member: 12496">Not sure of your definition of &quot;same file size&quot;, or if it is about same compression properties, like both Large or Medium.RGB&nbsp; images (speaking of JPG) are 3 bytes per pixel (24-bit color, RGB), so any 24 mp&nbsp; image actual data size is 72 MB (roughly) and any 12 mp image is 36 MB (roughly, because 1 MB is&nbsp; actually 1.049 million bytes).That is the actual data size (when opened in computer memory), but then JPG compression drastically reduces the size while in the file.D7200, 24 mp.&nbsp; Manual says Large JPG is approx 12.7 MB, and Medium is 7.2 MB.D300, 12 mp. Manual says Large JPG is approx 5.8 MB, and Medium is 3.3 MB.These sizes will vary with image content.&nbsp;&nbsp; Very highly detailed images (image of a tree full of leaves) will be larger, but bland featureless images (sky or a blank wall) will compress much smaller.&nbsp; A folder of many varied &quot;same size&quot; images will often show about a 2:1 size range of the files.But note these example numbers are proportional. With same compression, then 24 mp is about twice the file size of 12 mp.&nbsp; Because the number of pixels is 2x.So,&nbsp; if your &quot;same file size&quot; means actual file size in bytes, then of course my bet&nbsp; is on the 24 mp image, with twice the pixels and half of the JPG&nbsp; compression. &nbsp;But two Large images of same scene should look comparable.&nbsp; Depends really on how it is viewed.&nbsp; Viewed on our computer screen, both are normally resampled much smaller (2 mp will fill a 1920x1080 screen) to fit them onto the screen.&nbsp; 24 mp won't have the advantage then that it has when viewed at 100% Actual size.</blockquote>

[QUOTE="WayneF, post: 590964, member: 12496"] Not sure of your definition of "same file size", or if it is about same compression properties, like both Large or Medium. RGB images (speaking of JPG) are 3 bytes per pixel (24-bit color, RGB), so any 24 mp image actual data size is 72 MB (roughly) and any 12 mp image is 36 MB (roughly, because 1 MB is actually 1.049 million bytes). That is the actual data size (when opened in computer memory), but then JPG compression drastically reduces the size while in the file. D7200, 24 mp. Manual says Large JPG is approx 12.7 MB, and Medium is 7.2 MB. D300, 12 mp. Manual says Large JPG is approx 5.8 MB, and Medium is 3.3 MB. These sizes will vary with image content. Very highly detailed images (image of a tree full of leaves) will be larger, but bland featureless images (sky or a blank wall) will compress much smaller. A folder of many varied "same size" images will often show about a 2:1 size range of the files. But note these example numbers are proportional. With same compression, then 24 mp is about twice the file size of 12 mp. Because the number of pixels is 2x. So, if your "same file size" means actual file size in bytes, then of course my bet is on the 24 mp image, with twice the pixels and half of the JPG compression. But two Large images of same scene should look comparable. Depends really on how it is viewed. Viewed on our computer screen, both are normally resampled much smaller (2 mp will fill a 1920x1080 screen) to fit them onto the screen. 24 mp won't have the advantage then that it has when viewed at 100% Actual size. [/QUOTE]

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