Originally posted by Lowell Goudge Any one who leaves because of lack of full frame should have never entered.
Not exactly a fair assessment, Lowell. Needs change, people grow, etc.
In 2008, when I came back to photography, there wasn't a full-frame option for less than $4K, and spending that much on a completely foreign camera system to test the digital waters would have been - stupid. I'd been using Pentax cameras since 1979 so choosing them was an easy pick over Nikon (Canon has never been an option for me) at triple the price. And, I will still probably pick up a K-5 this year (or maybe its successor if it hits the market before Christmas).
Until about a year ago, the difference in dynamic range across the full ISO range, and the perceptual differences between full-frame and APS-C weren't relevant to me. But, I'm a different photographer today than I was in 2008 when I bought a K10D and then a K20D six months later. There is real value to me now in the perceptual differences that full-frame - and medium format for that matter - provides me. I couldn't care less about getting shallower depth of field, but I can get closer without having to go so wide that distortion becomes an issue. APS-C feels compressed optically to me, and I know that probably isn't even technically accurate. But, there is a palpable difference, visually, between the frame made by an APS-C camera and one made by a full-frame camera, using "equivalent" focal lengths to achieve the same angle of view. I happen to like the look of full-frame.
So yes, full-frame is becoming increasingly important to me and if Pentax chooses to shy away from it then I will have to move on. Oh well, it's been a fun 33 years. I'll keep my existing gear but going forward I'll just be investing in a Nikon system.