Originally posted by Raffwal John, what situations do you expect the K-01 to be more suitable for than your K-5? After all, it's not that much smaller. Do you just want a backup body? Or do you have high expectations for its video?
Good question, and you have some of the answers...
Backup - I was shooting with the K-5 in a large sandpit (a training ground for construction crews) and the lens release button fell off my K-5. I had my wife's K-x as backup, thankfully. Next time, I'll have the DA* 50-135 on the K-5 and the DA* 16-50 on the K-01. I'm also looking forward bringing the K-5, K-01, and my DA Limiteds (21, 35, 70) on my next motorcycle travel story. My most recently published story was shot with Panasonic M43. It will be interesting to see the difference.
Video - I have a GH2 that I've adapted my Pentax glass too. I'm anxious to see how the K-01 compares. If it works well, it can replace the GH2 or act as a backup, replacing my GH1. I haven't shot video with the K-5 all that much because of the lack of manual controls, but also issues with the sensor overheating. My GH2 can shoot for nearly 2 hours without overheating. We'll see if how the K-01 compares.
Candid and Portraits - One of the little-mentioned advantages of composing with the rear LCD is that you can A) Maintain eye contact and casual conversation with your subjects and B) Compose and shoot without being noticed. In my experience, the thing that draws the most attention to a photographer in a public or street situation is the act of bringing the camera up to your eye. This is more important than size, as it's an instantly recognizable action consisting of moving limbs much larger than any camera. Do that in any public place and people will know that you are about to take a picture. With the K-01 I can be much more discreet. My Panasonic GF2 is pretty discreet at well, as is my GH2 with the flip-twist rear LCD. But their biggest failings as street/candid cameras are the loud shutters. They are nearly invisible until you take the shot, then people look around. The K-01 is supposed to have a quieter shutter than even the K-5 (whose shutter sounds like a kiss IMO), so it should be a great photojournalist camera. With the K-5 I can take a shot 3-4 feet away from someone and they won't hear it. I can't wait to (not) hear the K-01.
The one failing of the K-5 and the K-01 in this regard, when combined with the DA Limiteds, is the AF noise. It will be interesting to see if I can MF and use the K-01 focus peeking in situations that demand near silence.
Everyday - My current everyday camera is the GF2. It's nice and small, but runs out of steam at ISO800. I should be able to throw the K-01 with the DA21 into my messenger bag no problem. Yes the K-5 is not much bigger, but boxy cameras slide into places where cameras with grips and viewfinder humps snag. I did consider the Panasonic GX1 for this role, as it will likely shoot ISO1600 clean and ISO3200 in a pinch. But the shutter is loud.
We'll have to wait and see if any of this pans out. I'll share my thoughts here and on my blog.