Perceptual MegaPixel

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The Perceptual MegaPixel (P-MP) is a proprietary ranking of lens-camera combinations, created by DxO Labs. 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 been never been made without the cooperation of DxO Labs. The name of the measurement is a trade mark.

The P-MP meant for photographers to consider when comparing the sharpness of a combination of camera and lens.[1] DxO Labs claims that P-MP is a more accurate and relevant value for photographers to consider when weighing-up camera sharpness.[2][3][4][5]

As of June 2014, the Carl Zeiss Apo Sonnar T* 2/135 ZF.2 lens mounted on a Nikon D800E have the highest measured P-MP. Since Dx0 Labs only report integer values, the score of 36 P-MP is at the theoretical maximum of the camera's 36.3 MP image sensor.[6]


  1. ^ DxO Labs tries making sense of camera lens sharpness
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  6. ^ Camera Lens Ratings by DxOMark