I think I probably heard a thousand times in our forum ... "22Mpx is more than enough ... how much more do you need?" ... Whenever this question pop-up at me, I always wonder ... if there is ever a living Ansel Adam or Richard Avedon hearing this .... what will be their responds?
Back in the old film days, these two Grant Masters used 8x10 films to create the absolute best images (both in terms of IQ & creativity) in the field of Landscape (Ansel Adam) and Fashion & Portrait (Richard Avedon) respectively ... and I am sure their works will always remain in the books and museums for generations to come!
If one converts a 8x10 film with a modern scanner ... say with 4000dpi ... a single 8x10 film will look like (4000 ppi)(8 in)(4000 ppi)(10 in) = 1280 Mpixels or 1.28Gb !!!!
So ... my question is ... is our current DSLR technology still coming a long way behind, in the eyes of the Grant Masters? Or ... if you are a Grant Master, will you be happy with 22Mpx or even with the Hasselblad H4D-200MS of 200Mpx, if you are leaving a legacy of works behind?
Large format will always be king in Real Pro landscape work. 4x5 or 8x10
Medium format is a good second and 35mm just doesn't have the same IQ as the LF or MF. I think 22mp is a good number for 35mm digital.
If Ansel Adams were to shoot digital, he would probably be shooting a Phase one Back adapted to Large format bellows, lenses, Along with his filters. The best he could get.