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Can someone please tell me the dpi needed for an 18x12in print from a 1d mk11n as i think it is less than 300dpi.
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It depends who's printing it and on what printer. The optimum dpi depends on the make of printer, Epson's work best with 360dpi, Canon's prefer 300dpi. Printing labs will generally advise on the optimum settings.
194.6dpi based on 3504(divided by 18) x 2336(divided by 12).
The only thing that matters is the distance between the viewer and the image. For example, an HD TV only has 1,080 horizontal scan lines of resolution regardless of size yet people buy 40, 50 or even 60 inch sets. The larger they are, the lower the resolution but they tend to be viewed from a longer distance so it doesn't matter so much.
I regularly print images 60" x 40" from a full frame DSLR with a pixel count of only 3,744 x 5,616 using a Durst Lambda, yet the image quality is excellent; no pixelation and no noise. The images are crisp & sharp and when viewed from even a few feet away look even better.
So called experts would say that the limit of a print from a full frame DSLR is only 12" x 18" at 300 DPI. This is rubbish and only serves retailers who are interested in selling mega pixel upgrades all day long.
Photos are ordinarily viewed at a distance equal to the length of their diagonal so a 60 x 40 image would be viewed from at least 5ft away.
A 12 x 18 image would be viewed from around 20 inches minimum.
If the viewing distance is further then you can reduce the resolution of the print and the viewer would be none the wiser.
Rembrandt, Monet, Da Vinci et al painted with very poor resolution compared to a TV or a camera but no one discusses that because that's not important.
It's the effect that matters.
ok thanks everyone
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