Originally posted by Rondec That's nice. For landscape shooters, the K-1 is about the best you can do. Even for wedding photography, it is a really high end camera. The dynamic range, smoothness of transition all look better than you can get with smaller format. Frame rate is fine as a reason to buy a camera and certainly the Olympus wipes up the floor with the K-1 in that respect, but for stunning landscape photos, I feel like you can't beat K-1 with pixel shift unless you go medium format.
That's lovely work. I have no doubts about the quality of the K-1's output. For me, the Olympus E-M1 Mark II made sense because I already own a number of other micro four-thirds lenses. If I bought a K-1, I'd have to begin buying Pentax full-frame lenses. Since I'd require more than just one, I couldn't stretch that far financially.
Also, I plan to shoot wildlife with the Olympus. With the Leica-branded 100-400mm zoom, I have a full-frame FOV equivalent of 200-800mm. That's optical zoom before any cropping. That's the kind of focal range you need when shooting animals. And it's all in a hand-holdable package with weather resistance.
Then there's size and weight. One can't call the E-M1 line tiny within the world of micro four-thirds. But it's still smaller and lighter than equivalent full-frame or APS-C gear. A few years ago, I thought seriously about buying the Sigma 50-500mm "Bigma" for my K-5. That was one heavy package. Even the slightly smaller 150-500mm was a serious proposition in terms of size and weight.
While the K-1's full-frame sensor is certainly superior in some ways, the very latest 20mp micro four-thirds sensor surprises many people with its image quality, dynamic range, etc. So it's not like it's a bust. And I have high-res mode as well for when I want to shoot non-moving subjects. If I need to shoot video, Olympus quality is now up to competitive levels.
I will, however, keep my eye out for the new Pentax APS-C flagship. Here's hoping it'll be enough of a leap over the K-3 to make it a "must have" item. Then, if I can't swing it even after perhaps selling my K-5 and K-5IIs (I'd keep my K-3), then I'll wait until prices fall later in its product life.