apefos, It seems that a 12MP Sensor would be more like optimum to produce a 4k crop. I really do not advocate using an 8 MP AFS-C/s35 Sensor

"So let's wait for the APS-C S35 sensor inside the GH5 and also a new set of some superfast prime and zoom lenses for it. But this will not improve low light, because they will need to keep 3840x2160 pixels inside the M43 crop and add more pixels to fill the S35. So the S35 sensor and the multiaspect M43 sensor will be the same in terms of low light."

There should be no insurmountable problem getting 3840x2160 pixels inside the entire width of a APS-C/s35 Sensor. And, just imagine what a SpeedBooster could do with it.

So let's wait for the APS-C S35 sensor inside the GH5 and also a new set of some superfast prime and zoom lenses for it.

But this will not improve low light, because they will need to keep 3840x2160 pixels inside the M43 crop and add more pixels to fill the S35. So the S35 sensor and the multiaspect M43 sensor will be the same in terms of low light.

@dial

Instead of waiting, find some good read about sensors and open the school physics book. It'll help a lot.

@apefos all of Panasonic's (and Olympus', except for their body cap lens) are electronic lenses. Thus it would be a piece of cake for them to implement a dummy proof feature that automatically scales down the sensor when a Panasonic lens is put on the camera by your typical average idiot consumer. They wouldn't even know it is happening quietly in the background! :-D

Panasonic will never use aps-c or s35 sensor in the lumix cameras. the reason is the lenses. they have large amount of lens models which uses m43 sensor. due to this they need to improve the sensor using multiaspect, backside iluminated, large photocells, better microlenses, and the organic thing in the future.

I saw some videos from cameralabs review about the G7, and the iso 6400 from G7 looks pretty good after denoise in post production. If Panasonic decrease the pixel count to 11.3 megapixels and restart to use the multiaspect sensor the low light performance will improve 1.55x compared to the G7, so it will be very good.

Also Panasonic did improvements in sensor which can make low light to be ok in iso 6400 if the GH5 uses this technology together with 11.3megapixel sensor, and it seems this sensor is not BSI yet, a back side iluminated sensor can improve low light even more, see:

http://www.imaging-resource.com/PRODS/panasonic-gx7/ZURPIXELSTRUCTURE.jpg

http://www.imaging-resource.com/PRODS/panasonic-gx7/panasonic-gx7A.HTM

Surely the big issue Panasonic have is they stopped doing new sensors for a while (they are just restarting sensor design) so they are quite possibly limited to whatever Sony has, which currently just seems to be the 20MP sensor. (Relatively few m43 cameras are sold, compared to say crop sensor DSLRs, so the market for sensors is limited.)

Also as you get the best 4k at one sensor pixel per video pixel (or several sensor pixels, just not 1.2-1.5) they might prefer a 16MP sensor, which will stop them doing 4k/50-60p unless Sony have a new one they aren't talking about.

Personally I see the obvious things for a GH5 to have is: (1) 1080p that doesn't skip pixels, so the moire/aliasing improves. (2) 4k/50-60p. (3) Internal 10-bit VLogL (4) Internal 422

What I'd like and I think is (maybe) possible: The above plus better low light performance (which isn't all coming from software), a higher res and larger EVF with less lag (as per the new Leica) and better still and video AF. Also USB3 and H.265, which is down to shoving someone's IP into a new Venus Engine iteration so not difficult (possibly their pro video people for the codec). A better high frame rate mode (so the quality doesn't dip so much) would also be nice, but I suspect sensor availability will again be an issue.

Anything more I suspect is wishful thinking, plus #2-3 will probably sell a decent number of cameras.

Here you mean that it needs to break physics laws :-)

What do you mean? Twice as clean at twice the ISO breaks phyics law? Is really clean ISO 6400 too much to ask for? Is it not possible to produce a MFT or APS-C Sensor that can do that?

The Nikon D5300 did that with "old" technology. Problem is that it is not near as good for Video as the GH4. Of course my A7s performs better yet at higher ISO, but is is FullFrame and cost much more too.

The GH4 is a much better camera in every way but high ISO, this is where the GH5 needs to improve most. If it is not usable in the poor/low light that I shoot, I will pass on the UpGrade.

The GH4 is already successfully optimized for Video. And, although I upgraded from my GH3 mostly for improved Stills, I think Video performance is driving the sales.

N1 problem is Low Light shooting.

The GH5 needs to be at least twice as good in poor light. If it takes 12MP or APS-C/s35 Sensor, that is what they need to use in 2016.

When the 12MP A7s came out, it sold for a premium over other A7 cameras. And it is still the "King" of low light, even over the A7sII that I sent back.

We do not need any of this "up to" hype. We need "Hands On" performance.

The future Panasonic "FlagShp" Stills camera can be a ReBadged FullFrame Lieca.

Panasonic is increasing the magapixel count. GX8 is 20 megapixel. G7 released before GX8 is 16 megapixel. Comparing the video from both cameras in iso 6400, G7 is much better in low light allowing a clean footage without tremble after denoise, which is not possible with the GX8. 20 megapixel is better for photo, but not for video, because low light will be worse and because the 4k crop factor will be even higher, so less shallow dof and more narrow field of view with lenses.

Sony is doing different camera sensors for the same camera model. In the A7 series we can see one model improved for photo with more megapixels, and other model improved for video with less megapixels which allows better low light footage and less crop for 4k video when using 3840x2160 pixels to get a clean image without moire and aliasing.

So maybe Panasonic will follow this approach in the GH5, two models, one with 20 megapixels using the same GX8 sensor, and other model with something like 11,3 megapixels with the multiaspect sensor for better low light and less crop in 4k 3840x2160 video. Or there will be this less megapixel sensor in GH5 for video and G8 will be 20 megapixel, a cheaper model as G6 and G7 are.

It would be nice to see Panasonic following this Sony idea of making two models, one with sensor improved for video with less megapixels and less crop in 4k and other model with more megapixels for photo work.

I think in terms of marketing this model with less megapixels would not hurt Panasonic sales for more expensive products and would be a good competition versus Sony cameras. Time to give people what people wants and deserve, 4k 60p, multiaspect sensor, great lowlight.

Dynamic range is another history... maybe we will see an increase in GH6, GH7, GH8...

I would prefer a CamCorder, but then I am sure it would have a different name.

I speculate that the GH5 will have a size and shape similar to the GH4.

Thanks for the answer.

Im see all the most wish list are hard in only an camera and inexpensive. Only we just need a full frame mode in a M4/3 sensor.