DxOMark

DxOMark is a website providing image quality ratings for standalone cameras, lenses, and mobile devices that include cameras. It is owned by DxO Labs.

The DxOMark Camera Sensor Score measures the quality of the RAW image captured by a camera.

The DxOMark Sensor Overall Score consists of three components:

Another metric, the Perceptual MegaPixel (P-MPix) is used to rate the resolution a camera produces when paired to a particular lens. DxO Labs claims that P-MPix is a more accurate and relevant value for photographers to consider than alternate measures of sharpness when evaluating camera and lens image quality As of December 2015, the Canon EF 300mm f/2.8L IS II USM lens mounted on a Canon EOS 5DS R have the highest measured P-MPix (45 P-Mpix) followed by the Carl Zeiss APO Sonnar T* 2/135 ZE (41 P-Mpix on Canon EOS 5DS R and 36 P-Mpix on Nikon D800E).

DxOMark data has been used to plot the progress of sensor image quality and low-light sensitivity versus price over the years, as well as the impact of sensor size and resolution.

DxOMark also provides lens ratings, as tested in combination with various camera models.

As smartphones overtake point-and-shoot cameras, DxO Labs started testing smartphones and other mobile devices in 2011 and introduced DxOMark Mobile in 2012.

DxOMark Mobile Overall Score is the headline number reported for each tested device, and consists of: DxOMark Mobile Photo and DxOMark Mobile Video.

DxOMark's Mobile Photo score is composed of these Categories:

DxOMark's Mobile Video score includes the same categories as DxOMark's Mobile Photo score, except that Flash is replaced by Stabilization.

DxOMark's tests are conducted under a variety of lighting conditions, ranging from low light 5 lux to bright daylight outdoors.

Users can select several devices of the same class and have the site display a comparison of their test scores and graphical versions of the actual test data.

DxOMark ratings are often used by the press to describe the image quality characteristics of their cameras and mobile devices. High DxOMark Mobile ratings have also been featured as hallmarks of quality in vendor announcements, although reviewers are careful to note that the ratings only reflect image quality.

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