Originally posted by Kunzite They're selling the 645z as "better than FF", though.
It is, in terms of IQ, probably 'better than FF' - but that matters very little, because it's not going to ever be 'better enough' for 90%+ of people to surmount the 400% premium you need to pay over entry-level FF to buy the body alone.
It's an $8000 body, with lenses that start at $1500 and work their way up. Very, very, very few people who buy a $899 aps-c body would ever consider 'upgrading' to a new-mount, $10K, $12K, $15K body + lens kit. They would, however, consider buying a $1600 or $2000 or $2500 body that
can mount their existing lenses.
645Z is a very nice specialty product, and for Pentax, perhaps an effective halo product - for the vast majority of people it's not an upgrade option, so it might as well be a Hassy or Leica or D4x.