Originally posted by AlexanderS Do you still use the K1 as much?
I haven't used it in more than a year. It got stranded in storage in a country I haven't been back to since the pandemic started.
They're very different cameras. The K-1 is slow, high-res, high-dynamic-range, high-high-ISO-performance. The E-M1 II, on the other hand, is fast (so fast! so fast I had to turn the frames per second down in the menus) with the autofocus benefits of mirrorless like face/eye detect. But 20MP seems to be the physical limit for the sensor size, there haven't been improvements since 2016 with the sensor in the E-M1 II. DR is about on par with Canon full frame, so I think criticisms in that arena are often overblown, but it can't be denied that it is a few stops less than the K-1. ISO 6400 is barely usable, 8000+ is quite poor - but this is mitigated somewhat by mirrorless autofocus, the fact that your depth of field isn't razor thin at f1.8, and that the Oly primes perform well at their maximum apertures. On the K-1 I would need to shoot at F4 just to have a prayer of getting focus close enough on, say, a dancer at a poorly-lit event. The Oly will hit at F1.8, letting me keep the same shutter speed with lower ISO and similar DOF.
If I had to pick just one camera system, it would probably be M4/3. It's a better do-everything system if you ever shoot moving subjects or need video. The stabilization is the best of any system. I can fit most of my kit in a backpack in the space where a FF 70-200 would have gone, and with less weight. You can even print surprisingly large with some assistance from tools like Gigapixel AI and appropriate viewing distance considerations. Which apply to the K-1, too.
I also just picked up a 645Z to be my slow, high-res, big-printing camera. So I'm not sure what the K-1's role will be when I finally get my hands on it again. I will probably keep it, just because I love the thing, and it shares batteries and flash accessories with the 645Z. But I expect I will get rid of all of my lenses except for the limiteds and vintage/soviet glass.
They say you should keep at least a sensor size between your systems - so APS-C is too close to FF to make a lot of sense, but M4/3 to FF is a big enough jump. I don't think it will encroach too much on the K-1's territory, while still providing a substantial image quality improvement over 1". Something like an E-M10 or Pany G95 aren't even much bigger than a 1" camera. And if you do find it replaces the K-1 in the long run... well, just means you found a better tool for your job, right?