Originally posted by rognone IMHO a super (and "killer") feature to have on a future K-3 III would be a sort of Hybrid OVF a la Fuji X100F.
For those who have tried it, I am sure they will agree... for the others: image an OVF but with a little display (let's say 25% of the total dimension) on the bottom right side...
and you can activate this little window to see in real time what you want: histogram, focus peaking, zebra lines or just the magnified portion around your focus point.
Now, on a mirrorless like X100F it's easy... no mirror in front of the sensor. But put that feature in a K-3... with the amazing OVF that Pentax already offer... for me = simply perfection.
(optimal use = correct focus confirmation when you are in AF... like a "manual Eye-AF"... or an amazing help with manual focusing!)
A hybrid OVF/EVF a la X100 series of Fujifilm cameras is "easy" to do on a rangefinder camera because the EVF is just a mirrorless EVF and the OVF is a normal rangefinder OVF (with some electronic information overexposed, if you like, like the mimicking of the rangefinder patch, or a full blown out OVF). I love it on my X100s (no rangefinder patch, though). BUT... yes, it's a big "but"... BUT, how do you make it work with a mirror on it?. When it's on OVF mode, the mirror is down and the secondary mirror is AFocusing... If you switch to "live view/EVF" mode, you lose the AF of the DSLR mode, that's why AF live view is usually much worse than a viewfinder's.
If our camera had dual hybrid AF points on the sensor (and no need for the secondary AF mirror) then, yes, you can put a hybrid viewfinder and have the best of both worlds. BUT, and it's a big but, it's not that easy. And that's why the Nikon Z6 and Z7 don't focus an ass: because they don't have the D500 or D850 focusing systems, because they don't have two mirrors (actually the secondary one is enough for that; but then it wouldn't be mirrorless... like when you use the F-mount adapter, which has a permanent mirror for the AF...). But, hey! It works and people digg it (instead of crying bullshit!), so I guess it's desirable: a DSLR camera with two mirrors, only one moving up, and the secondary one discreetly in the middle all the time, so mirror down = DSLR and the OVF might have extra electronic info (like the X100_,s,t,f series have) or mirror up = Nikon interpretation of mirrorless for K mounts plus full EVF.
It
*might* actually work(*)!
Note: * provided new lenses with motors suited for contrast and phase detection (this is, big, fast swoops for phase detection, and then many small, fast, silent steps for the contrast comparison). I bet that's expensive and new for Pentax...