Have you ever wondered why some images have a printed size that’s bigger than others, yet taken with the same camera? Chances are it’s because of the DPI of the image. Learn how to set your dpi preferences in both Photoshop and Lightroom to maximize size and quality.

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  1. Fluk3 (Reply) on Friday August 26, 2011

    It’s not DPI, it’t PPI.

    Dots per inch (DPI) is for printers and imagesetters (machine dots).

    Pixels per inch (PPI) is digital image resolution.

    Why don’t people understand this?

  2. Fluk3 (Reply) on Friday August 26, 2011

    DPI != PPI.

    DPI is “dots per inch” (as in machine dots for printers and imagesetter).

    PPI is “pixels per inch”.

    This is a common mistake – you might want to revise the title to PPI instead of DPI so as not to confuse and misinform your readers.

    I’m not sure why my previous correction was moderated. Moderators, If you do some research, you will find my assertion to be accurate. I think people should use the correct terminology and acronyms when publishing tutorials.

  3. RON (Reply) on Friday August 26, 2011

    Why are we using 240?
    As I understand it 300 is the standard for photographic printers. So why are we not using 300?

  4. Mario (Reply) on Friday August 26, 2011

    I also wonder, where these 240 dpi/ppi come from. It’s Lightroom’s default, but apart from that I have no idea.

  5. Art of Photography (Reply) on Friday August 26, 2011

    1. 240 is considered the lowest DPI for acceptable prints (depending on image and format you can get away with less). And yes, many consumer printers/companies consider 300 dpi a standard (no real reason for that however).

    2. Rafael keeps saying the file size is bigger. It is not (assuming you are just changing the ratios), the file size stays the same. The IMAGE dimensions is what changes.

    3. If they don’t un-check Resample Image, they ARE going to create different file sizes because the image file itself will be modified. If they make two or three image size changes, they run the risk of rendering the file useless (Hugh halos etc).

    There are better videos out on the web about this subject. Seriously consider re-shooting/re-editing this one.

  6. Gordon (Reply) on Friday August 26, 2011

    My question also, why 240 dpi. I understand that for the EPSON Pro Printers 360 dpi is the best. I use Color Byte RIP processor and they recommend 240 dpi input but their output to my EPSON printer is 360 dpi.

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