Originally posted by sir_bazz Hi Steve,
I agree with that poster.
We've seen many images of Pentax glass working as it should on other manufacturers fullframe DSLR's. What's so different about the K mount that would prevent us getting the same result on a Pentax body?
Really? Of course, everyone is entitled to believe what that want, but I have not seen anything printed on an A3 or A2 prints, or any 100% crops, that would enable me to make any such judgement.
I would be pretty sceptical too. The corner performance of most Pentax FF lenses wide open is not that good even on APSC. Check out Photozone for the following
FA*24, FA43LTD, FA50F1.4, FA77LTD, FA*80-200.
In their day, some of the best lenses made but simply not telecentric enough to work well on digital, especially FF (or even APSC). If I have to stop down even ONE STOP more to get decent edge performance on FF, I lose all the advantages (noise, DOF etc) that everyone blathers on about.
So, Pentax WOULD have to rework many of their existing FF designs to work with FF, and contrary to what anyone sais, they are unlikely to make a FF camera with only 7 production FF lenses, all primes.
In the meantime, anyone is welcome to read through some of the Canon forums where its clear not all is well in Canon land with some of their wide angle zooms....looking at these reviews from Klaus at Photozone I'm not massively surprised.....
Canon EF 17-40mm f/4 USM L (full format) - Test Report / Review