Apple's iPhone X has defeated Samsung's Galaxy Note 8 and Huawei's Mate 10 Pro as the top smartphone camera for stills on DxOMark ratings. With a photo sub-score of 101, the iPhone X has scored one point more than the Galaxy Note 8 and Mate 10 Pro, which scored 100 each. However, the iPhone X has failed to dethrone the Google Pixel 2 as the best smartphone camera with an overall score of 97, which is one point lower than Pixel 2's score of 98.
The highlights of iPhone X's camera include its ability to render accurate colours and maintain white balance in most lighting conditions. It also offers good exposure with an ability to preserve details and shadow in HDR scenes. The test notes that the iPhone X has low levels of noise in most lighting conditions.
With the iPhone X, Apple offers almost the same dual camera setup as the iPhone 8 Plus - a 12MP wide-angle lens with f/1.8 aperture and another 12MP telephoto lens with f/2.4 aperture. The major difference being that both the lenses are optically stabilised on the iPhone X, while on iPhone 8 Plus, only the wide-angle lens supports optical image stabilisation.
The DxOMark Lab notes that the iPhone X has good detail preservation while using a zoom lens in different lighting conditions. The bokeh effect in portrait mode has also been found to look natural than competing devices. However, the iPhone X seems to be occasionally slower in autofocus and produces underexposed images with visible red-eye in flash-only shots. There are also noticeable artefacts on moving objects.
The iPhone X's lower overall score compared to the Pixel 2 is primarily due to its lower video sub-score. The iPhone X has a video sub-score of 89, which is lower than 96 scored by Pixel 2. DxOMark observes that the iPhone X renders accurate colours with good exposure and maintains white balance while shooting videos. It also preserves details and has effective stabilisation, but there is a loss of sharpness during tracking in low light. Other cons of shooting videos on iPhone, according to DxOMark, include high-frequency oscillations during walking movements and visible luminance noise in low light.
The iPhone X noticeably improves on the iPhone 8 Plus in areas like zoom performance and shooting natural-looking bokeh effect in portrait mode. With an overall score of 97, it is tied with Huawei's Mate 10 Pro and DxOMark concludes that the iPhone X is "exceptional for stills" but falls short of Pixel 2 in the video category.