Originally posted by szurinaga If pentax does come out with a FF body, then you should also expect a new line of FF glass to come out at the same time. Almost all of their lenses are the DA's for aps-c and only the old FA's and DFA's could work on FF cameras. Expect the new lenses to look a lot like the DFA 100mm f/2.8WR, Full frame, great optics and a beautiful design
It's the lenses that are the issue. They require a 14-24 and a 24-70 or equivalent, plus a longer reach model. That's expensive glass, so a limited market. But it has to be there.
They also would require a TC and a WA prime, plus an 85 and maybe 135 as well.
I am ignoring the long end for now.
Optical formulas are available, but whether they can do the deed on reflective, SR sensors is another issue.
If Pentax does issue an FF, they may very well do so swiftly after announcement to avoid cannibalizing K-7 sales. The MF price point did not endanger K-7 sales, but FF definitely would.