LG UT8100 (IPS) vs Panasonic Z85A

The LG UT8100 television unfortunately does not meet expectations in the HDR effect category. A peak brightness of only 300 nits on the luminance chart is well below the required value to fully enjoy HDR effects. In practice, the image resembles SDR quality more than true HDR, which is particularly evident in demanding high-contrast scenes. The coverage of the DCI-P3 colour palette is only 82%, which further limits the ability to present vibrant and rich colours. Instead of impressive visual experiences, we receive a muted and washed-out image. For those looking for a television to fully utilise HDR content, the LG UT8100 model turns out to be quite disappointing.

The Panasonic Z85A is an OLED television, so you can immediately expect excellent effects in films. And indeed – our tests showed that the WOLED panel can achieve around 800 nits of peak brightness in optimal conditions. This is a solid result, performing well in most demanding HDR scenes, allowing viewers to enjoy a dynamic and detailed picture. However, like every OLED, the Z85A also has its limits. In very bright scenes that fill the entire screen – like the final sequence from the movie The Meg – the television reduces brightness to around 400 nits. This is standard behaviour for this technology, so if someone plans to watch films in a heavily sunlit living room, it is worth keeping this in mind. The coverage of the DCI-P3 colour gamut at 98% also deserves high praise. This allows the television to reproduce a wide range of colours that stand out with vibrancy and depth, while details in HDR scenes are sharp and precise. In short – the Panasonic Z85A delivers a solid HDR effect that will satisfy any film enthusiast.

The Filmmaker Mode on LG UT8100, while theoretically the best for watching movies, has significant issues. The biggest problem is the white balance – drops in blue cause a noticeable yellowing of the image, visible in both HD and 4K content. These issues are confirmed by measurement results in the Colour Checker test, which indicate significant deviations in colour reproduction.

In terms of brightness characteristics, both HD and 4K content exhibit a large tonal boost. The gamma curve in both cases remains well below the reference value of 2.4, which leads to excessive brightening of darker elements of the image. A similar problem is evident in the EOTF curve – in the case of 4K content, the TV struggles to manage brightness correctly, resulting in issues with screen brightness. This means the factory settings of this model require significant adjustment to achieve better picture quality.

The Panasonic Z85A offers many picture modes, but the Filmmaker mode definitely stands out from the rest. It's rare for a TV straight out of the box to be so well calibrated, and the unit we had the opportunity to test truly impressed us.

However, there were some minor shortcomings. In the SDR signal, we noticed a slight deficit of red and blue, which made the picture appear cooler than it should have been. This is particularly evident in the comparison image. In contrast, with 4K HDR material, the situation was the opposite – the surplus of red made the image seem warmer than intended by the creators. In terms of brightness characteristics (gamma) and maintaining an appropriate EOTF curve, it's hard to find faults. There are slight deviations, but they are so minimal that the average viewer is unlikely to notice them.

It's also worth highlighting that our observations relate to a specific unit of the TV. Two identical models may differ from each other due to natural production variances. Nevertheless, the piece we had in hand looks really solid and deserves praise. Now it's time for our calibration – we'll see if we can squeeze even more out of this screen!

After calibrating the Filmmaker Mode, the gamma has been aligned to practically perfect, reference values, which has significantly improved the overall tonal characteristics in HD content. 4K HDR content also looks better, although some issues are still visible at the extreme ends of the graph, where the curve deviates from the ideal. The EOTF curve performs worse since the TV struggles to maintain the correct brightness values. As a result, the image in some scenes may be too bright or slightly dim, which stems from the device’s design. Nevertheless, the calibration brought significant improvement, particularly for HD content, where the tonal balance and colour reproduction are now at a much higher level.

The Panasonic Z85A offers truly wide-ranging capabilities when it comes to picture settings, so we eagerly set about calibrating it. Although we mainly focused on adjusting the white balance, the final effect exceeded our expectations. Both HD and 4K HDR content now showcases nearly perfect colour reproduction, with minimal errors that are hard to catch with the naked eye. Well-calibrated TVs are a rarity, and we must admit – it’s truly satisfying. While the gamma and EOTF curve didn't require drastic adjustments, we managed to further stabilise their characteristics across the entire brightness scale. After calibration, the Panasonic Z85A is a true gem for home cinema enthusiasts. The picture is precise, the colours are natural, and every scene looks exactly as the director intended.

The fluidity of tonal transitions is also correct, although the effect depends on the settings. The update improved the operation of the smooth gradation function, smoothing transitions better than before, but introduced minor issues with detail loss, e.g. on textures.

Image scaling on LG UT8100 performs very well. The image presents itself decently, with no major issues regarding edge aliasing. Details are preserved at a satisfactory level, making materials of lower resolution look really solid on this television. As a result, users can enjoy watching older content without any noticeable defects in quality.

Now that we know how the Panasonic Z85A handles tonal transitions in 4K material, it’s time to take a look at its "Gradation Smoothing" function. It works, but unfortunately not entirely effectively. Regardless of the chosen value – whether it’s low, medium, or high level – we couldn’t achieve perfectly smooth tonal transitions in our test sequence. We recommend setting this function to an intermediate level. While this may slightly blur fine details, at least it avoids the problem of losing film grain, which can be crucial for many viewers when watching classic productions.

When it comes to image scaling, the TV performs quite well. It’s noticeable that the image is slightly sharpened, and thin lines can sometimes appear a bit jagged. However, this is standard for most TVs, and fortunately, it can be adjusted using the sharpness slider. This gives us full control – we can achieve a more vivid, blurred image or a clearer one, although it may appear more "harsh" and artificially sharp. It all depends on the user's preferences and the type of content we’re watching. Overall, the scaling is at a solid level and should satisfy most users who are using lower resolution material.

LG UT8100, equipped with a 60 Hz panel, is particularly suited for those watching movies. The television offers the TruMotion system with a de-judder effect adjustment, which allows users to tailor the smoothness of the picture – from more choppy to exceptionally smooth, resembling a soap opera effect, depending on user preferences.

The Panasonic Z85A features a 120 Hz panel, which will surely please both gamers and sports fans. Sure, it’s not 144 Hz like some gaming TVs, but in practice, the difference is really hard to notice. In games, the picture is stable and sharp, and during fast action, there’s no sign of any blurring. The same goes for sports – a player’s quick run or a car’s dynamic maneuver looks smooth and natural. The TV also has an “Intelligent Frame Creation” feature, which is a motion smoother. There are two sliders here – one controls motion blur reduction, while the other adjusts motion smoothness. With these, you can tailor the picture to your own preferences – whether you prefer a more cinematic effect with gentle transitions between frames or a maximally smooth image ideal for watching sport.

LG UT8100 offers basic features for gamers, such as ALLM and Game Bar, which makes it easier to access settings. The TV also supports HGiG, improving picture quality in HDR games. Unfortunately, the lack of support for Dolby Vision and VRR limits the device's capabilities, as does the 60 Hz panel, which excludes support for 120 Hz resolution. This model is more suited for less demanding gaming applications.

Panasonic is mainly associated with home cinema televisions, but the Z85A shows that it can also step into the gaming world with a truly strong punch. It's a device that can easily be called a gaming beast – it has everything needed for comfortable gameplay.

Even though it has only two HDMI 2.1 ports, both operate at full bandwidth, so we can easily connect both a next-gen console and a gaming PC. All the key features are supported: ALLM automatically switches the television into game mode, VRR provides smooth visuals without stuttering and tearing, and with properly implemented HGIG and Dolby Vision, HDR games look really good – colours are vivid, details are sharp, and dark scenes are clear. We also find a Game Bar in the form of a transparent, circular menu. It may not look as impressive as the competition's, but it's intuitive and includes all the most important settings we’d want at hand during gameplay.

In summary – the Panasonic Z85A is a device that truly surprises with its gaming capabilities. It's a television where both console gamers and PC gamers will feel at home. It's smooth, dynamic, and just good.