![]() This is really all we need – when specifying size in pixels, resolution doesn’t matter! Nevertheless, Lightroom won’t let you leave it blank, so go ahead and leave it at its default of 72. For example, for Facebook, I export with the long edge at 960 pixels (vertical photos will be 960 pixels high, horizontal photos, 960 pixels wide): When we export photos to post online or to send by email for on-screen viewing, we customarily specify size in pixels, since monitor sizes are specified in pixels. its native resolution):įor more on the topic of resolution in printing, do read my article, “ How Large Can I Print My Photo?“ Exporting for Screen-Based Viewing ![]() ![]() Similarly, when printing in the Print module, specify the resolution your printer prints at (i.e. There are simply limits to how large you can print. Let Lightroom do it – it will do a better job. If you are printing large and are afraid that you will be upsizing too much and the quality will be poor, don’t make the mistake of reducing resolution! The printer will still print at 300/360, and since you haven’t given it enough pixels, it will do the upsizing. Lightroom will calculate and output size in pixels: 8”x 10” print at 300 PPI = 2,400 x 3,000 pixels. This gives your printer the exact number of pixels it needs to print at its best: Most printers print at 300 Epson printers print at 360 – but check your printer manual or your printing service’s website. In this scenario, in the Resolution box in the Export dialog, we specify for resolution whatever resolution / PPI our printer (or printing service) prints at. Lightroom allows us to specify size this way, but for it to figure out how many pixels to output, we have to tell it how many pixels per inch (PPI) to include – this is called resolution.Įquivalently, Inches x Resolution (PPI) = Pixels When we export to send something out to print, we are accustomed to specifying size in inches or centimeters rather than in pixels. (On enlarging, this does have its limits – read my article, “ How Large Can I Print My Photo?“ Exporting for Printing Lightroom is very intelligent in how it removes or adds pixels, to preserve the appearance of our photos. When we export, we specify how large our copies should be made – reduced for online sharing, possibly increased for large prints, or left at the same size as our master photos. For example, a photo from a 24 megapixel (MP) camera has 24 million pixels - 6,000 wide x 4,000 high: Our photos are made up of pixels – squares of solid color that our camera sensor captures. As I monitor forums, I see so much confusion about resolution and how to set it in Lightroom, that I thought it was time for a post on it.
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