Marcelo, I would say your maths is ok, but really the formulas help to prevent one from seeing pixels in a print. While I usually aim to have at least 300 actual original pixels per inch in my prints, In the past, I have blown up images of a similar 6Mpixel size to 20x30 inches (let alone centimeters) and while they are a little soft up close, by the time you stand a few feet away they look fantastic. I used a step upsizing action to hide the pixels. I have also have used similar sized images as A3 landscape spreads in A4 glossy brochures and when printed with Stochastic screening they also look fantastic. I say use the formulas as a guide but don't lose too much sleep over it, you would be suprised how many everyday images in magazines were originally below the recommeded dpi. Try lots of resolutions (with and without upsizing to correct dpi) in practice and you will soon see for yourself what works.
Nathan Nathan Gaydhani - Imaging & Design -----Original Message----- Subject: [PRODIG] D70, D100, and high res for printing Am I doing wrong calculations, or magazines and books that currently use digital images (and that need these sort of sizes, for example, for spreads) are resampling the photographs? Marcelo Mammana =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
