I always said, APS_c was my favourite set of compromises.
APS-c for macro
APS-c for telephoto
FF for landscape.
APS-c for hiking or any time you are carrying your gear.
FF when I can set up and take my time, not going far from the car.
If I had to get rid of one of my cameraa, my K-1 would go before my K-3. That being said, I really like having the K-1. It'a great camera to shoot with. It's just the conditions under which I can use it are more restricted. My guess is a 645z would be even more so.
In actual usage terms, I have on my hard drive currently, 1060 K-1 images an 1000 K-3 images, some of those images carried over from other years. But there were many more K-3 exposure because I so often shoot wildlife and birds in burst mode. I take 23 images in a burst and keep one or two. In terms of actual preference expressed by the number of keepers the K-1 is on top. However, in my experience, the K-3 is better at taking pictures I use the K-1 for than the K-1 would be taking images I used the K-3 for, but it's not that great a difference. I have landscape taken with the K-3 and wildlife / birds taken with the K-1. You have to look at the exif to tell which is which.
After all the FF hype on the forum, I was expecting the difference with FF to be considerably more noticeable. I have not one side by side set of images showing the K-1 gives better IQ, and I've taken a few. I have a lot of images that I suspect are better because they were shot with the K-1, but the only time I've actually shot side by side to compare it's come out a draw, in overall IQ, not pixel peeping perhaps, but even then it's pretty close to a saw off.
Originally posted by abhaskare How does the extra weight of body+lens feel in real life? Also, I thought my K5ii+18-135 made me stand out of the crowd when most were using cellphones! Does a K-1 +28-105 seem much bigger and prominent than that?
A while ago with the K-1 I heard someone behind me say to a spouse, "Look how big that freaking camera is" with the K-1. It's odd, but I've never heard that while carrying the K-3. Maybe that's just coincidence, who knows?