How large can you scale a 300 DPI image before it begins to deteriorate if the file is to be output at 1200 dpi? 133 lpi? I think I'm off in my calculation but here's what I came up with. To convert lpi to dpi, I multiply it by 1.52, yes? So 133 x 2 = 266. So I can reduce my image to 266dpi to print it at 133lpi? Not sure where the 1200dpi comes into play.