Hi all. As I said I would write what I can, mainly about Pentax (of course).
I will edit the post if I recall anything later.
I did not have any meeting or else, I don't think I would be granted on either but:
I didn't see any K-S1 (not that I looked for it). K-S2 was all over the place ans so was the K-3. K50 was shown too.
FF 3D model was there (under glass). I did not see any "serious lens" or DFAs so kindly asked. The (very nice) guy didn't expect that, it seems but asked me to get back about an hour later 'cos the lenses were used/shown by a colleague in a meeting behind closed doors. I thought that was it but.. when I came back later he apologized, told me to wait and gave me both DFAs to try ("quickly, 5 minutes, my colleague still need them").
So about the DFAs: (keep in mind I could only play for 5 minutes)
* those were working samples (but definitely looked finalized)
* I'm not used to big lenses but... those are HUGE piece of glass. And heavy of course. Guys with little hands, you will suffer
* as for mechanical feeling/construction, my 50-135 really feels almost cheap. No way comparable.
* balance is alright on a K-3 without grip (expected). With grip, it should be perfect.
* the tripod attachment looked VERY sturdy to me. I handled the combo just with the attachment moving it a bit and I could not create some play.
* AF is... well, if you're used to Pentax AF, you can say hello to Star Trek era. It almost feels science fiction lol. Faaaaast. Really.
I also tried Sigma 150-600 (I think it was a Nikon D800) @ 600 (not fair I know) and it felt pedestrian in comparison.
* Manual focus seemed to me demultiplied so it was a bit difficult to focus (couldn't do it very fast because demultiplied) but precise it certainly was. Of course this is without the limiter.
* 150-450 buttons were not usable.
* Did I say those things were fast?
As a comparison of feeling/size/weight, the only comparison within Pentax/Ricoh is the DA645 28-45. Very close. And yes, the 645Z was available for trying with multiple lenses (all stupidly small compared to the 28-45).
FF expected oct/nov 2015.
Tried the GR which is way smaller and lighter than expected. If only it had a 35mm...
Didn't take pictures of DFAs but 645Z and 28-45 for size comparison purposes. Will update the post later.
Hope it helps.
PS: Guys, Ricoh is serious. Really. My left arm still feels it
EDIT: on the EVF subject, I tried Olys cams and XT1. XT1 was annoying but usable. Olys felt to me like old screens from VHS camcorders from 30 years ago: flickering and half a second late. XT1 is very usable for 2 minutes. After it gets annoying. Slowly... maybe in 2-3 years time EVF will become really usable. Maybe.