u have 2 sets of dpi to work with, the image dpi and the printers dpi
all image dpi can be saved as 125 dpi the print dpi should be 720 or higher
for small prints 11 x 17 or smaller i use image dpi and print dpi of the max my printer will go.
large prints 2' x 6' by 300 dpi image can be a 70 meg file printing that image at 1400 dpi can make it over a gig in size. could take over 1/2 hr or more before it compiled, spooled and ready to print. exporting that 2 x 6 as a 125 dpi image and printing at 720 to 1400 dpi it will start to print almost instanly and the quality is just as good ad the original 2x6x300 dpi image.
just rember a $ saved is not always a $ saved it could be a lost customer
I've always heard that 300 dpi is the optimum print resolution. However, images from my 6 MP camera are not large enough for even an 8x10 at 300 dpi, much less something like an 11x17. Recently however, I read a post on this site saying that print resolution should usually be between 240 and 300 dpi. Is 240 going to be distinguishable from 300 in most cases? What is the lowest resolution you would try to get away with?
Also, why is "ppi" used increasingly instead of "dpi"?