TinMan opened this issue on Aug 08, 2000 ยท 20 posts
karlm posted Thu, 10 August 2000 at 8:44 AM
okay, so A4 is 210mm x 297mm ~ 8.27" x 11.7". So, for 200ppi, dimensions need to be 200x8.27=1654 by 200x11.7=2340. so landscape, 2340x1654, or close to that depending on what aspect ratio you use. If you're going to spend the money on a good print, why not spend the extra time for an Ultra Render (unless you run out of memory which happened a lot to me on my old computer when rendering Ultra at 3600x2700). Anyway, don't worry about opening the image and seeing 72 ppi on some huge page size. 72 ppi is just the default when no ppi information has actually been stored in the image file and given the dimensions you rendered at (1600x1131), it will calculate what the page size will be. If you go in to Photoshop, go to image>image size, make sure "resample" is NOT checked, then change your print size. You'll see it will automatically calculate what the ppi will be. Or, you can change the ppi and it will automatically calculate what the print size has to be to get this dpi. Just remember, it's not changing the image (it's fixed at 1600x1131 pixels), it's just adding information on how it will be printed. If it knows the print size, it can calculate the dpi, if it knows the dpi, it can calculate the print size. It's three pieces of info (pixel dimension, print size, and dpi) and any two can calculate the third. Also note that it's only information for you and does not need to be set since the printer will adjust the print size to the size that you request and you will get the corresponding ppi. -karl