QN70F is a TV that can positively surprise when it comes to brightness. In ideal test conditions, it reaches even 800 nits, which – for this price range – is really solid. Of course, that's a result from measurement test patterns, so we decided to check how it performs in practice, with real movies. Here, the TV somewhat tones down its capabilities. In most of the tested scenes – for example, in "The Meg" – the actual HDR brightness was around 500 nits. That's still a good result that allows you to enjoy HDR effects, although it is far from perfect. On the other hand, we have a QLED screen with a quantum dot layer, which means very good color reproduction capabilities. The colors are vivid and saturated. QN70F covers about 94% of the DCI-P3 color space, and in the wider BT.2020 gamut, it exceeds 75%, so in this regard, there's nothing to be ashamed of.
TCL C7K is one of the brightest MiniLED televisions in its price range. Under the best test conditions, the screen was able to achieve over 1200 nits, resulting in impressive, and at times blindingly bright scenes. And most importantly – this is not just a theoretical measurement. In practice, the brightest parts of movies can shine with true cinematic grandeur. Home HDR cinema fans should be truly pleased.
The impression is especially great in scenes with large areas of brightness – white skies, explosions, sun reflections, or magical sunsets can surprise with the intensity of light that rarely appears in this price range.
However, things get a bit worse when more challenging scenarios appear on the screen, which have been described in terms of contrast – meaning images full of details, with small bright elements against a dark background. In such cases, the C7K often chooses to retain black at the expense of brightness. An example? Scenes from the movies Sicario 2 or Life of Pi, where small light sources (like a distant lantern) can be less visible, and details in the lights are simply dimmed or blend into the background.
For many viewers, this may be an acceptable compromise – as we achieve deep blacks and pleasant image texture. Nevertheless, it is worth being aware that the visibility of small details in bright areas is not the strongest suit of this model. It is simply a technological limitation that still exists – even with over 300 zones.