shootinglulu Posted January 17, 2011 Share #1 Posted January 17, 2011 Advertisement (gone after registration) Hello...I need to send a highest possible quality photo file which will be printed at A2 size. The people have just stated RGB 300 dpi.. I have read that you can change dpi on export from Lightroom but i cannot see how this is done or any mention of dpi in lr export. I don't use ps. I would be very grateful for some help. Thankyou.. Lucy Link to post Share on other sites More sharing options...
Advertisement Posted January 17, 2011 Posted January 17, 2011 Hi shootinglulu, Take a look here sending high quality files, setting dpi?. I'm sure you'll find what you were looking for!
01af Posted January 17, 2011 Share #2 Posted January 17, 2011 Hello...I need to send a highest possible quality photo file which will be printed at A2 size. The people have just stated RGB 300 dpi. I have read that you can change dpi on export from Lightroom but I cannot see how this is done or any mention of dpi in Lightroom export. I don't use Photoshop. I would be very grateful for some help. A2 size is 42 × 59.4 cm, or 16.5 × 23.4 inches. At 300 ppi, that's 4,960 × 7,015 pixels. To arrive at this size, an M8 image needs to be upsized by a linear factor of 1.78×; an M9 image needs to be upsized by a linear factor of 1.35×. With proper processing, M8 and M9 images will take this (moderate) degree of upsizing just graciously. However, most likely the persons asking for '300 dpi' files simply have no idea what they actually are talking about. Usually they just thoughtlessly repeat a buzzword they once learned without really understanding what it means. In most cases, they'll be happy if you just deliver files with the EXIF ppi field set to '300,' regardless what the actual pixel size really is. Link to post Share on other sites More sharing options...
shootinglulu Posted January 17, 2011 Author Share #3 Posted January 17, 2011 Thankyou Olaf.. I have sent the file at 300 ppi, they can ask me to re send if needs be and then try figuring out upsizing:mad:. Thanks for your time. lucy Link to post Share on other sites More sharing options...
jaapv Posted January 17, 2011 Share #4 Posted January 17, 2011 RGB? Which RGB? Usually nowadays printservices can handle aRGB, but if they are still on sRGB you could have a color space mismatch. They should specify. Link to post Share on other sites More sharing options...
shootinglulu Posted January 17, 2011 Author Share #5 Posted January 17, 2011 That's a point! They just said RGB so i presumed adobe RGB..I may be re sending this file:o.. Thanks Jaap. Link to post Share on other sites More sharing options...
jaapv Posted January 17, 2011 Share #6 Posted January 17, 2011 In general, in cases like this, it is safest to send the smallest color space, sRGB. Link to post Share on other sites More sharing options...
01af Posted January 17, 2011 Share #7 Posted January 17, 2011 Advertisement (gone after registration) Oops ... I guess it's purely academic by now, but I'm afraid I got the linear magnification factors wrong in my previous post. Forgot to take the different aspect ratios of the Leica cameras' image format and the A2 format into consideration. So just for the records—the factors really are 1.89× for the M8 and 1.43× for the M9. By the way, the Leica S2 would provide A2 size at 300 ppi natively, i. e. without upsizing. But in the final A2-sized print, you'd be hard-pressed to note any visible difference between an S2 image at native size and an M9 image that got upsized properly. I'm not saying there were no differences at all ... but at A2 size or less, they'll be really subtle. The size advantage of the S2 (or similar digital medium-format cameras) will become obvious for most people only at print sizes significantly larger than A2. So—asking for 300 ppi file to print at A2 size is a rather foolish thing. But as I said, those people usually have disconcertingly low knowledge about their own business ... Sending just your camera's full-size files (w/ or w/o some post-processing applied, as you think fit) should be just fine. And don't worry about the RGB colour space; images out of the camera or out of Lightroom will always be properly tagged so both sRGB and Adobe RGB (or whatever) should be equally fine. Link to post Share on other sites More sharing options...
shootinglulu Posted January 17, 2011 Author Share #8 Posted January 17, 2011 My emailed photo hasn't been rejected..yet!..maybe all will be well.. Thanks very much Jaap and Olaf for your help. Lucy Link to post Share on other sites More sharing options...
jaapv Posted January 18, 2011 Share #9 Posted January 18, 2011 Oop Sending just your camera's full-size files (w/ or w/o some post-processing applied, as you think fit) should be just fine. And don't worry about the RGB colour space; images out of the camera or out of Lightroom will always be properly tagged so both sRGB and Adobe RGB (or whatever) should be equally fine. Provided the receiving side reads the tags properly...Which considering the 300 DPI request makes a 50-50-chance Link to post Share on other sites More sharing options...
tobey bilek Posted January 18, 2011 Share #10 Posted January 18, 2011 Use sRGB unless they tell you otherwise. If your mail server will not handle files that large, then use sendthisfile.com Link to post Share on other sites More sharing options...
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