Timmbits: I am really not saying this to criticise, but I wouldn't mind having something like this at a lower resolution (like 10-12MP) so it has even larger photosites (with all the benefits that accompany that - less noise, better sensitivity... smaller file sizes).
The performance of this isn't _that_ impressive, when you consider that the Nikon1 was offering frame rates like this for years now (probably also using a Sony sensor). I suspect when Sony-semi signed Nikon there were certain performance non-compete clauses in effect for X-years.
Only 70mm lens equivalent (remember, that is like a 45mmAPSC). OK for portrait, but not for wildlife or sports (games, etc) and the other stuff. That is understandable, because if you want more, Sony wants to sell you the RX10, and if this did that, there may be no RX10.
Price will come down over time. Maybe I can afford one in a couple years. ;)
Larger pixels may have less noise but if you look at the image as a whole, [there's rarely a big difference](http://www.dpreview.com/articles/5365920428/the-effect-of-pixel-and-sensor-sizes-on-noise). Except, of course, that the higher pixel-count image will show more detail, in many circumstances (even when downsized).
Smaller file sizes is a fair point, though.
Most Nikon 1 cameras so far have used Aptina sensors. We don't know about the latest models, yet.
Samuel Dilworth: It would be interesting if DPReview would spend a few words explaining WHY the GX8 is so big compared to the GX7, despite the removal of the flash (itself not a problem for me), etc. Maybe Panasonic USA can help.
The GX7 is itself hardly tiny. Is the GX8 bigger chiefly because some people want bigger cameras, or is it bigger for technical reasons that can’t be easily circumvented? Clearly the viewfinder is bigger, but that doesn’t account for much.
It is what it is and I don’t write off the camera, but it sure is beefier than I expected.
The most I can offer is what I wrote in the final slide:
*Clearly Panasonic has concluded that there are users who value a substantial grip and reassuring sturdiness over having the smallest, lightest mirrorless model*
When we met them to discuss the camera, they gave no explanation of the additional size but were keen to draw attention to the 'hand-fitting grip.'
photogeek: Does it overheat while shooting video like all other Sony cameras?
Sony only claims 5 minutes of recording for 4K (almost certainly because of heat).
Slowfish: What is the true resolution at 960FPS (2 sec option) ?
Timmbits: can you not see that slide, including the text: 'In Quality Priority mode, 960/1000fps mode yields only 1136 x 384 pixel capture, with 480/500fps made from 1676 x 566 pixels and 240/250fps upscaled only slightly from 1824 x 1026 capture.'?
I'm also not sure what you mean by 'they don't really say.'
I've got all the figures (and calculated the crops) and they'll be included in the full review.
G1Houston: My key concerns: Shutter shock and auto-ISO implementation in both M mode and Motion Movie mode. Hope GX8 is better in these areas than the G7. Does dual IS work in video mode?
Digital stabilization tends to mean shifting the area of the sensor from which the video is derived. (So if you tilt the camera down, slightly, it captures the video from slightly further up the sensor, to ensure that the subject stays in the same vertical position).
The digital stabilization on the GX8 can correct for lateral translations, vertical translations and rotation around the lens axis. Combine these with the pitch and yaw rotational correction of the lens and you have 5-axis IS (albeit with 3 of those axes being corrected digitally).
By comparison, the camera's sensor movement (used for stills), can move to correct for lateral and vertical translations, plus pitch and yaw. These are augmented by the lens pitch and yaw corrections to give 4-axes but with a larger range of movement than lens or in-body IS could offer on their own.
As per [this slide](http://www.dpreview.com/articles/8964627573/fully-stacked-hands-on-with-sony-s-rx100-iv-and-rx10-ii?slide=7), the 2 sec (Quality Priority mode) video is made up from 1136 x 384 captured pixels.
AbrasiveReducer: All this technology. But it seems that when they try to get the best quality from a compact camera it still ends up pretty big.
I'd agree with bluevellet on this: it feels like a camera that's been made larger specifically to appeal to people who want a solid-feeling camera with a substantial and comfortable grip.
Michael Ma: I never once thought, "I wish I just had 4 more megapixels on a MFT sensor". Quite the other way around actually. I love what the A7S is trying to do.
Michael Ma - what do you think the a7S is trying to do?
It felt to me like a camera with a sensor designed to offer (1920 x 2) x (1080 x 2) video, rather than better low light stills. (Whether you interpret that as UHD 4K or super-sampled 1080 is a matter of perspective).
It is less noisy at higher ISOs that its higher pixel count rivals, but [not by much](http://www.dpreview.com/articles/4613822764/high-iso-compared-sony-a7s-vs-a7r-vs-canon-eos-5d-iii/2) in real-world applications.
It performs slightly better than [theory alone would suggest](http://www.dpreview.com/articles/5365920428/the-effect-of-pixel-and-sensor-sizes-on-noise), because it appears to have some kind of non-linear response as you increase the ISO. But at many ISOs, the higher res cameras offer more detail, even when downscaled.
The a7S is impressive in low light, but that seems more like a pleasant side-effect of its video-centric design.
MDGColorado: It's odd to consider recent Panasonic innovations like DFD and IBIS + lens IS to be a drawback. These features have improved performance using Panasonic lenses, but they have not hurt performance using other lenses.
We don't consider them a drawback: I said one of them sounds impressive and I expect the other to match a system we were impressed with. Neither of these is a bad thing.
However, moves that limit you to Panasonic's own-brand offerings undermine part of the appeal of a multi-party system. It means any existing Micro Four Thirds users with Olympus lenses won't get the camera's full benefit and it means your choices become restricted if you want the best performance.
That doesn't take away from the features, which are certainly nice to have, but it does mean the system is more restrictive than it one seemed.
As covered on [Slide 6](http://www.dpreview.com/articles/9485436827/the-big-beast-hands-on-with-the-panasonic-lumix-dmc-gx8?slide=6):
"Digital image stabilization can be used when shooting 1080 footage, with this also combining with the in-lens stabilization to offer 5-axes of correction."
So there is *a* Dual IS mode, but it's not sensor shift + lens movement, it's digital IS + lens movement.
mpgxsvcd: You can just tell that Dpreview is loving this camera already.
'Butler' doesn't hate Sony (or any other brand). I believe they've made some models that are more impressive as engineering showcases than as enjoyable cameras, but it's individual models I review, not brands.
I gave both the RX1 and RX100 III Gold awards, off the top of my head.
HelgaS: Any info on whether the rx iv is compatible with the nauticam rx iii housing?
Jennyhappy2: the RX100 IV is churning on apace. Before the end of the month, certainly.
AdamT: Hokay Richard ..
I don`t think the IBIS/Lens IS co-working "wall" matters one jot, the fact that it has IBIS at all (like the GX7) makes it far more of an option for use with Olympus lenses than any other Panasonic , 4 Axis simply makes it even more of a practical alternative , who cares if the IS works better with Panny lenses (lets face it, Panny make the best small / slow zooms anyway by far in M43) , it still works far better with Oly lenses than any other Panasonic body and a good few Olympus ones too !
Does it have an AA filter on the sensor ?
how is the E-Shutter done, full 12Bits like the GX7 or the 10Bit compromise of the GM series, G7 and GH4 - does the new sensor allow fast scan and 12 Bits ?
Most importantly - Has the thing got electronic 1st curtain - and is the shutter the clacky rat-trap that graced the GX7 or something nice and quiet like the EM5-II ?
Nothing's been mentioned about EFC.
I agree IBIS is a benefit - this isn't a review, I'm just saying that it's sad if you end up being essentially constrained to Panasonic lenses to get the best out of the camera.
We discussed Auto ISO in Manual with Panasonic but I don't believe it allows exposure comp.
Impulses: Does IBIS not work at all with non-Panasonic lenses or is it the combination of IBIS+OIS that doesn't? I'm fine with the latter tbh, it's somewhat understandable... There seems to be very little talk of IBIS sans OIS tho.
Is there an EFC or has the faster sensor readout mitigated rolling shutter effects enough to not need EFC? (doubtful)
Does the exposure compensation dial and exp compensation itself work in conjunction with Auto ISO in Manual mode? Would love to have an answer to all these before August and general availability.
Also, if IBIS isn't used at all for video even at 1080p, can we assume it's not used during the 4K Photo modes either? Is it active during image composition? I'll love you long time if you can answer even half of these Richard. :P
IBIS works with non-stabilised lenses - you miss out on the Dual IS benefit.
1. is IBIS available in video mode?2. is auto iso available in M mode?3. is (when put in) external mic blocking screen?4. is it real multi aspect sensor?5. If you can ask Pany: are they planing Post Focus firmware for this model?
As Impulses points out, IS in video mode is a combination of lens IS and digital correction in the camera.
raphb: I think its interesting to compare the new RX100 M4 / RX10 M2 sensor to the non-BSI version (announced June 2012) and see the regression in picture quality:
It could just be that you're looking at a part of the scene where ones of those lenses happened to be sharp and the other happened to be soft.
But no, the image quality (certainly at the Raw level) is not worse that the 2012 model.
It's externally the same, so I can't see why it wouldn't be (Please don't buy one on the basis of that assumption, though).
aerorail: the m3 looks sharper to me or should i say less blurry than the newer m4
color-wise... no one knows what accurate color is unless you are looking at the set in person
The RX100 III is sharper in some regions, the IV is sharper in others.
These differences are well within the range of performance we'd expect to see unit-to-unit and shot-to-shot. Since both use the same lens, it's reasonable to assume there's no real-world difference.
Kawika Nui: " it's trying to be a non-specific interchangeable lens camera: a camera where you don't have to think about whether it has a mirror or not."
Can someone explain this point? When I shoot with a DSLR, I never bother to think about whether it has a mirror or not. When I shoot with mirrorless (or Sony SLT), I never bother think about whether it has a mirror or not.
The only time I have thought about mirror/mirrorless is for video: can't stand having to view through the screen when shooting video, so I prefer the mirrorless. But that was a one-time decision that took about 10 seconds of thought.
Is there any common shooting situation where one needs to think about whether it has a mirror or not?
Tell that to the people arguing about whether Mirrorless or DSLRs are superior.
My point is that this camera tries to (and does a really good job of) offer all the advantages of mirrorless *and* all the capabilities of DSLR, so that it's irrelevant which technology it uses.
Looks at the [Raw files](http://www.dpreview.com/reviews/image-comparison/fullscreen?attr18=lowlight&attr13_0=sony_dscrx100m4&attr13_1=sony_dscrx100&attr13_2=panasonic_dmclx100&attr13_3=canon_g7x&attr15_0=raw&attr15_1=raw&attr15_2=raw&attr15_3=raw&attr16_0=1600&attr16_1=1600&attr16_2=1600&attr16_3=1600&normalization=full&widget=1&x=0.19380408879969915&y=0.4834375291592795) and you'll see the IQ is not regressing (though we'll look closely at the noise reduction being applied in JPEGs, and see whether the example you highlight is typical).
The difference increases [as the ISO rises](http://www.dpreview.com/reviews/image-comparison/fullscreen?attr18=lowlight&attr13_0=sony_dscrx100m4&attr13_1=sony_dscrx100&attr13_2=panasonic_dmclx100&attr13_3=canon_g7x&attr15_0=raw&attr15_1=raw&attr15_2=raw&attr15_3=raw&attr16_0=3200&attr16_1=3200&attr16_2=3200&attr16_3=3200&normalization=full&widget=1&x=0.19380408879969915&y=0.4834375291592795).