All about DxOMark

DxOMark is the trusted industry standard for camera and lens independent image quality measurements and ratings. For years we have established our reputation for the best:

• Rigorous hardware testing
• Industry-grade laboratory tools
• Database of thousands of camera-lens test results

The overall DxOMark Score is obtained by combining a series of scores that indicate the image quality of lenses mounted on different camera models.

• Three scores correspond to the following photographic conditions: night or sports scene, landscape, and portrait. In photographic parlance, we call these conditions use cases.
• Five scores are based on well-known optical characteristics or metrics: resolution, distortion, vignetting, transmission, and chromatic aberrations.

To help photographers rank and compare photographic equipment, DxOMark provides four scores showing camera sensor image quality performance:

• Sensor Overall Score, showing the performance for a general-purpose use case, and computed from the following three use case scores:
• Portrait Score, based on optimum Color Depth.
• Landscape Score, based on maximum Dynamic Range.
• Sports Score, based on Low-Light ISO.

Learn how DxO Labs tests camera sensors and lenses and how the DxOMark scientific measurements and protocols are defined.

Definitions of the digital photography terms and the DxOMark specific terms that we use throughout the site.