The Panasonic Lumix GH4's Intelligent Resolution mode makes a standard image look like a higher resolution one by processing the contour areas, texture areas and smooth areas individually. There are three available strengths - low, standard and high - and an Extended option which increase the zoom range. Despite all the clever behind-the-scenes processing, it's fairly easy to tell which image was taken with Intelligent Resolution turned on and which one with it turned off due to unwanted artifacts appearing, particularly if viewing onscreen at 100% magnification. While the difference isn't quite so apparent on a print up to A3 in size, we're not convinced enough to recommend regularly using it. Still image: Max. 2x (Aspect ratio sets at 4:3. Not effective with L size recording. Magnification ratio depends on the recording pixels and aspect ratio.) With this in mind, you’d expect the 1080p modes to share the same crop as the UHD modes and simply scale them down by a nice even factor of two, again to avoid artefacts from non-integer scaling factors. But interestingly Panasonic has chosen to capture the full sensor width of 4608 pixels and scale it down to 1920 pixels with a non-integer 2.4x reduction. The benefit is that 1080p footage shares the same horizontal field of view as shooting stills, but the downside is again the potential for artefacts from the non-integer scaling factor. With this in mind, those wanting the best 1080p output may prefer to shoot in UHD and scale it down by two times.

IEEE 802.11b/g/n, 2412 MHz - 2462 MHz (11 ch), Wi-Fi / WPA / WPA2, Infrastructure mode, WPS, Wi-Fi Direct Brightness (7 levels), Contrast and Saturation (7 levels), Red-Green (11 levels), Blue-Yellow (11 levels)The Lumix GH4 offers a wealth of continuous shooting options: three speeds for full resolution images at 2, 7.5 or 12fps with a mechanical shutter, or a Super High speed option which records 4 Megapixel images at 40fps with an electronic shutter. Panasonic quotes a buffer of around 100 JPEGs or 40 RAW files. C4K] 4096x2160:24.00p, 100Mbps (IPB) (LPCM)/[4K] 3840x2160:24.00p, 100Mbps (IPB) (LPCM)/[Full HD] 1920x1080:24.00p, 200Mbps (ALL-Intra) (LPCM) / 100Mbps (IPB) (LPCM) / 50Mbps (IPB) (LPCM)

We shouldn’t be surprised or disappointed by the low light capabilities of the GH4 in 4k – it is what it is, and if you want cleaner results at high ISOs, you’ll simply need a bigger sensor, which in turn means a more expensive camera. For me though, the more revealing story here is the difference in quality between scaling with an integer and non-integer factor. Panasonic made the decision to capture the full width of the sensor in the 1080p modes and use a non-integer factor to scale 4608 pixels down to 1920. This is no different from the GH3 before it, but I’d have preferred to crop the field of view a little and enjoy the far superior quality of integer scaling. Of course the good news is you can achieve just that by filming in UHD and downsampling later, but it seems a shame this may render the high bit rate and all Intra 1080p options redundant. Panasonic also claims that the new processor helps produce better image resolution, dynamic range and more accurate colors, as well as doing hefty number crunching for 4K video encoding and giving a boost to the GH4's AF speed. The GH4 also includes a pop-up flash unit, that's activated by a soft button along the left side of the EVF. Still image: Bulb (Max. 60 minutes), 1/8,000 - 60/Motion picture: 59.94Hz: 1/16,000 - 1/30, 50.00Hz: 1/16,000 - 1/25, 24.00Hz: 1/16,000 - 1/24 (24.00Hz: 1/16,000 - 1/24 (When using Synchro Scan)There’s no GPS built-into the Lumix GH4, but the Lumix Image app can be set up to record a GPS log with your phone that can later be synced with the camera. The process has been simplified with the latest version of the Image App. Apart from the lighting changing slightly on this windy day, I’d say the detail in the crops above is identical. Obviously the 4k modes are making a wide-shaped crop from the sensor so you lose a lot of vertical picture height compared to the native 4:3 stills, and the video crop also loses a little from the sides too, but it certainly opens up a lot of potential for people who want to grab decent quality stills from video. And remember action shooters, you’re recording these 8 Megapixel 16:9 shaped images up to 30 times a second, so capturing the decisive moment should be a breeze. It’s also a surprisingly effective way to take portraits, as a person’s expression – especially for kids – can change significantly in split seconds. Despite 4K video recording as the hallmark feature of the new Panasonic GH4, Panasonic's new flagship mirrorless camera is still a top-notch camera for still photography. I had a couple of weeks to spend some quality time shooting with the GH4 -- out on the streets of New Orleans and along South Carolina's coast -- and right off the bat, I was very impressed with both the image quality and performance of this new mirrorless camera. Expressive / Retro / Old Days / High Key / Low Key / Sepia / Monochrome / Dynamic Monochrome / Rough Monochrome / Silky Monochrome / Impressive Art / High Dynamic / Cross Process / Toy Effect / Toy Pop / Bleach Bypass / Miniature Effect / Soft Focus / Fantasy / Star Filter / One Point Color / Sunshine