The Perceptual MegaPixel (P-MP) is a proprietary ranking of lens-camera combinations, created by

DxO Labs DxO is a French company dedicated to photography. Founded in 2006, it is located in Boulogne-Billancourt. It markets DxO PhotoLab, ViewPoint, and FilmPack image processing software and a connected camera, the DxO ONE. History DxO created DxOMark ...

. It is intended to express the resolution of which a combination of camera and lens is capable. Complete scientific or technical documentation of the process used to compute P-MP values has never been published, and P-MP measurements have never been made without the cooperation of DxO Labs. The name of the measurement is a

trade mark A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from oth ...

. The P-MP meant for photographers to consider when comparing the sharpness of a combination of camera and lens. DxO Labs claims that P-MP is a more accurate and relevant value for photographers to consider when weighing-up camera sharpness. As of March 2017, the "Canon EF 300mm f/2.8L IS II USM" lens mounted on a "Canon EOS 5Ds R" has the highest measured P-Mpix value in the DxO Labs lens database, a value of 44.7. On the lens' summary pages this figure is rounded to an integer value of 45 P-Mpix

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