i dont want to get flamed for this but, I know megapixels dont mean shit anymore, but I use the full 21mp that I have. I have been printing 24x36 images for my thesis and at 300 dpi and at 21mp that makes a 13x19 basically. When I blow them up to 24x36 I really dont lose any quality, photoshop does a good job, but it wouldnt hurt to print a 24x36 without blowing it up