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The micro four-thirds camera format debuted in 2008 and was immediately a hit. These compact machines have interchangeable lenses, giving them much of the versatility of pro-level DSLRs, but in more diminutive and portable bodies. While the smaller micro four-thirds sensor means the image quality suffers a bit, most photographers were willing to forego the extra megapixels for a lightweight camera they could take anywhere. Even as the micro four thirds standard has matured and these cameras' capabilities have blossomed, that travel-friendly portability has remained one of the main selling points.
[wiredtired wired="The new 20-megapixel sensor offers 4K video support and improved dynamic range over the GX7, the previous model. Solid, well-constructed body is comfortable to shoot with. Dual image stabilization system, fast autofocus, and improved high ISO performance make this camera's low light capabilities among the best you'll find in this class." tired="Loses the lightweight, highly-portable advantage that makes micro four thirds so appealing. Image quality gains aren't as large as the jump in sensor resolution would lead one to assume. The dual IS feature requires a compatible Panasonic lens."]
Which is why Panasonic's GX8 micro four thirds shooter represents something of a challenge. If you love micro fourth-thirds format for its photographic versatility and the ability to capture stunning video, then you'll love the GX8. But it's not terribly small when compared to other MFT cameras, so if you're drawn to the category primarily for its petiteness, the GX8 may not be what you want.
The GX8 is the sequel to Panasonic's GX7, a powerful and sublimely designed compact camera that arrived three years ago. But this new camera has less in common with that GX7 and much more in common with Panasonic's larger, video-centric GH4. In fact, if you took the GH4, shrunk it slightly, then upped the still image resolution a bit, you'd have the GX8.
Like its predecessor, the GX8 features a magnesium alloy frame, but unlike the GX7, the GX8 doesn't use too much plastic and keeps the body mostly metal. The result is the sturdiest, most well-built micro four thirds camera I've tested. But the trade off is that the GX8 has gained a bit of weight, tipping the scale at over 17 ounces (nearly 20 percent heavier than the GX7). The GX8 is also wider, taller and thicker than the GX7. It's no DSLR behemoth, but it is a substantial camera.
The GX8 still manages to fit nicely in the palm, and it's not so heavy that I ever felt the need to carry it in a bag. It's comfortable to wear at the ends of a strap. I found the grip on the right side a bit large, but the level of comfort will largely correspond to the size of your hands.
<h3>Take Control</h3>
The rangefinder-style layout adds some retro appeal, but aside from the eye piece being on the far left there is no functional difference between the GX8 and, well, any of Panasonic's SLR models. I went in thinking the rangefinder-style design was a bit gimmicky, but after a few weeks of use, I came out a convert. Then again, I used to shoot film rangefinders all the time, and I still prefer them to SLRs. I also shoot with my right eye pressed to the viewfinder, which allows me to keep my left eye on the scene. If you shoot with the left eye, the rangefinder layout becomes less appealing.
[pullquote quote="The GX8's 20-megapixel sensor makes it the highest resolution micro four thirds camera currently on the market."]The GX8's retro vibe extends to the physical knobs and switches for selecting shooting mode and focus mode, and the exposure dial. There's also a dedicated AF/AE lock button and the usual assortment of four-way control pad, function and Q buttons. As with most cameras in Panasonic's fleet, many of these controls are customizable. As somebody raised in the ancient days of film, it's a pleasure to see more features emerging from the depths of touchscreen menus and landing back on the camera body.
That said, Panasonic has some of the most well designed menus in the camera world and, as noted, you can assign pretty much any menu function to any button you'd like. The end result is a highly customizable set of controls that are easy to tweak to fit with how you shoot.
The electronic viewfinder is big, bright, and one of the best I've used. It's on par with what FujiFilm packs into its new XPro 2. The GX8's EVF has a nice feature that allows you to rotate it up so that you can look straight down into the camera, which gives you that momentary sense of nostalgia for that old Rolleiflex, but also turns out to be very useful when shooting video. That said, using an EVF is an acquired taste---one I haven't fully acquired yet. But I have no major complaints.
<h3>Lookin' Sharp</h3>
The GX8 has a new 20-megapixel sensor, which replaces the 16-megapixel sensor in the GX7. It's not a huge difference, but it does make the GX8 the highest resolution micro four thirds camera currently on the market. In terms of image quality, I could not tell a huge difference between sample images taken with the GX8 and those from the GX7. If you're planning to print for billboards, you'll likely see a difference. Otherwise, the change is not as dramatic as I had hoped. Image quality isn't all a new sensor brings though, and I did feel like the dynamic range I got from the GX8 trumped what I've seen from the GX7.
The GX8 also gains some higher ISO capabilities. The GX8 will let you shoot all the way up to ISO 25,600. As you would expect with very high ISO, there's quite a bit of noise at the top of the camera's range. If you're posting images to Instagram, you can probably get away with using 6400 ISO. If you plan to make prints, I would consider 1600 the upper limit, though in some situations you might be able to use images at 6400. The maximum shutter speed is 1/8000s, or can go up to 1/16000s if the electronic shutter is used instead.
One place the GX8 trumps its predecessor is with the autofocus system. It's fast and accurate. The in-body image stabilizer works to keep things sharp too. And even better, there's a new dual IS system which takes advantage of both the in-body image stabiliser and the lens's optical image stabiliser.
For testing, Panasonic sent along the Leica DG Summilux, 15mm f/1.7 lens, which supports the new dual IS system and, while I wasn't expecting to be bowled over by it, I was. I was able to routinely hand-hold shots of durations lasting as long as one second, bracing the camera against my face, and get an image with no visible blur. This significantly improves low-light performance and makes the 1600 ISO limit mentioned earlier less of a problem. In fact, I never encountered a low-light situation the GX8 couldn't handle. Of course to get the dual IS you'll need a newer lens that supports it (Panasonic has been rolling out firmware updates for some older lenses as well).
There's a new 4K Photo mode that uses the camera's 4K video engine to capture short burst of footage from which you can pull 8MP still images. It sounds gimmicky, but it actually works pretty well in situation you know that the 10fps is going to let you down. The images are not nearly the quality of what you get otherwise, but they're good enough to get some images of the kids' soccer match on Instagram. The GX8 also has a host of features one would expect on a new camera: stop-motion video; time lapse, panorama, and HDR modes; Wi-Fi connectivity, and support for NFC pairing. It's thoroughly of the times. It's even a touch ahead of the time with support for Panasonic's much touted "<a href="http://www.wired.com/2015/11/panasonic-cameras-get-a-shoot-now-and-focus-later-feature/">post focus</a>" feature.
<h3>Moving Pictures</h3>
Finally, a word about video: The GX8 could be the best micro four thirds camera out there right now for video---at least in terms of image quality. Two things keep it from besting Panasonic's video superstar, the GH4. First, there's no way to output video over HDMI at all while recording, and second, instead of the industry standard 1/8-inch microphone jack, the GX8 uses 2.5mm microphone socket. This means you'll need an adapter for just about any microphone you hope to use. Despite those quibbles (which will give the professional filmmaker pause, but probably don't matter for most of us) the actual video output is amazing. And yes, it shoots 4K video, too.
The GX8 ends up being a very capable performer and probably my top pick in the current Panasonic micro four thirds line up. That said, if you prize portability above all else, I strongly suggest laying your hands on one of these cameras before you commit. It's bigger than you might think.
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