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09-14-2013, 11:15 AM   #1
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DPI of raw files vs jpg files

I only recently started shooting in raw+ on my k30 but today ive been looking at the raw files and the jpg files afterwards, according to photoshop cs6 the raw files only have 240 pixels per inch while the jpgs have 300. Could anyone tell me why this is?

09-14-2013, 11:29 AM   #2
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09-14-2013, 11:37 AM   #3
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DPI means nothing.
Your photos are displayed according to pixels, and raw files have more pixels than jpeg. Raw files also have more information per pixel, which means they can show more colours.

The twist is, that most computer monitors cannot show all of those colours. Most monitors only show about as many colours as a jpeg contains. But there are special monitors (16 bit instead of 8 bit) that do show all of these colours/tones. But they are much more expensive.
And of course, the jpeg is a raw file that has been developed. Jpegs look better than an untouched raw file. You need to develop (post process, edit) the raw file to make it look as good (and better!) than a jpeg. With raw files, most software will also edit them without losing any data, and you can always revert back to the original look.

DPI is pixels per inch, which is only important in print, where a certain number of pixels is printed on a certain area. But print stores will ignore your DPI anyway and simply print to the maximum DPI that their printer allows, or the maximum that your file can give for the selected print size. DPI can be important if you use your own printers, but it will have to be selected in the printer software. The field "DPI" in a jpeg's metadata doesn't mean anything anymore.

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