Skiff
Well-known
You need 16MP for a 30x40cm print at 300dpi with no cropping, so I think a 12MP Nikon D3 would come up short even for most photographers. Of course, as I said, if you only post to the web, almost anything will do.
I have done so much direct comparisons with big prints from different film and digital cameras. MP count is much much overrated.
Using an excellent lens, having a really sharp picture and good color (or BW) are the most important things.
I've made excellent 50x75cm prints from 12 MP.
30x40cm prints from the D3(s) are made with about 240dpi.
From a normal viewing distance you can't see a significant difference to 30x40cm 300dpi prints from the D5.
