Apple's smart HDR feature generates images that "have excellent exposure and wide dynamic range under all conditions".
DxOMark concluded that the iPhone XS Max had "one of the best cameras ever" and had significant improvements in many ways compared to last year's iPhone X. Their comments praised the iPhone XS Max cameras for being "totally reliable" and "constantly providing good images. "
However, in lower light, DxOMark found that the noise of the iPhone XS Max became "more intrusive than other high-end phones," adding that the iPhone XS Max's zoom capability lagged behind its competitors - especiallyHUAWEIP20 Pro. In addition, they also said that the device is "an essential choice for any mobile photographer".
DxO, a well-known French image lab, has been testing and grading smartphone cameras for years, but they often arouse some suspicion and criticism. Because the quality of camera evaluation is subjective, at least to some extent.
From iPhone XS Max
From iPhone X