The Panasonic Lumix DC-GX800 is a new entry-level compact system camera that can record 4K video. Both of these latter issues, though, really do only show up very rarely. The picture isn't particularly bright with SDR, though, it must be said. As usual with such features, though, it does noticeably darken the image. So big a difference can this feature make to the picture that it's one of the few areas where Panasonic could perhaps have introduced a bit more refinement. When it comes to smart connectivity, Panasonic continues to resist the allure of the Android TV OS. Best of all, it's the first TV ever launched that supports both of the HDR10+ and Dolby Vision high dynamic range (HDR) formats. And that only adds to saving you a packet. For the most part we suggest keeping this very low indeed, usually no higher than 30 per cent. And as this is a Freeview Play model you also get a full selection of catch-up TV players, plus UKTV Play, CBS Catchup and Horror Bites. Which isn't surprising, really, given OLED's similarities to the plasma technology that used to be such a Panasonic speciality. The DC-GX800 has a range of selfie modes, a 180-degree tilting LCD screen, built-in wireless and NFC connectivity, a 16 megapixel sensor, 4K movies at 30fps, and a touchscreen interface.

I measured input lag at a measly 10.2ms. There are a few other modes that might help in certain circumstances. There are inevitably some limits to the Panasonic GX800's picture performance. Remember, if you want to start from scratch, look for the ‘restore factory settings’ option in the settings menu. These vary depending on your TV’s make and model, but you’ll usually see variations on a theme of ‘standard’, ‘dynamic’, 'cinema', 'game', 'sports' and, increasingly, 'HDR'. The Panasonic GX800 starts at £649 for the 40-inch, going up to £799 for the 50-inch, £889 for the 58-inch, and £1,399 for the 65-inch model. Despite being three inches smaller than the Panasonic GX800, not supporting Dolby Vision and being less bright, this Samsung TV costs £60 more. It also introduces a useful new multi-deck home screen. For starters, the GX800 shifts away from the low-contrast IPS panels used in many of Panasonic's previous LCD sets. The GX800's bodywork is pretty heavy on plastic. Now we’ve covered the main picture setting modes, it’s time to talk about picture processing. It's not much use buying an amazing TV if you don't know how to get the best out of it. Detail levels, for instance, are perfectly pitched. There are genuine benefits in having dynamic HDR metadata support on a mid-brightness screen like this. This setting (and variations of this 'dynamic' option) will see your TV adapt its brightness depending on what is showing on the screen – so during a darker scene, it will go dimmer to hit deeper blacks, and then bump up the brightness for a light scene. This 55-inch Sony model may be slightly smaller than the Panasonic GX800, but it's also slightly cheaper at £849, uses a direct rather than edge lighting system, and provides a huge number of apps via its Android TV smart platform. A lot of content is still standard dynamic range (SDR), so it's good to find Panasonic's TV handling such sources seriously well. Black levels are even more impressive in SDR than they are with HDR, and the HCX processing again shows a beautifully assured touch when it comes to upscaling HD to 4K, gently adding detail and density while simultaneously reducing noise without removing any natural grain a source may contain. Finally, there's a very slight hint of colour banding during HDR sequences that contain exceptionally subtle colour blends (typically dusky or heavily clouded skies), while some very specific mid-dark scenes reveal a slight vertical shadow down their left and right hand edges. That said, older or more affordable models are often best with modes such as these switched off as they can sacrifice detail at the same time as darkening blacks or brightening whites.

Please refresh the page and try again. As a rule of thumb, we suggest you start with all processing off, adjust your picture settings and go from there. Dolby Vision, HDR10+ and Dolby Atmos – this mid-ranger will have AV fans drooling, says Steve May The days of HDR elitism are over. Dolby Vision™ & HDR10+ Dynamic Metadata means you get the best from UHD Blu-ray discs & 4K video streaming services. In fact, the super-narrow glossy black screen frame and pleasingly metallic, centrally mounted desktop stand create a rather elegant look. In fact, one or two really heavy duty Dolby Atmos moments, such as the most bombastic parts of Blade Runner 2049's massively dynamic score, can cause the bass drivers to bottom out into an uncomfortable crackle.