Stephen A. asked a question this morning, how many pixels are needed to get a good large print. My assumption is that he means from a photo printing shop, not from his home inkjet printer.
I’ve had this chart for a while, though I don’t remember where I got it from — probably either SmugMug, Digital Grin, EZ Prints or RitzPix. If you work with a photo-printing house and have better info, please let us know.
|Print size(in.)||Min. width(pixels)||Min. height(pixels)|
This suggests a minimum resolution of 150dpi, though I believe the printers actually have a much higher “resolution” than that. Most print shops have ‘real’ photo printers, not dot matrix, so they don’t measure resolution the same way we computer people do, and they’ll interpolate up as they can, but this is probably a good minimum to start with. I’d double all those numbers, to be closer to 300dpi to start with. Remember that the “dpi” setting in photoshop really doens’t mean as much as the total number of pixels does.