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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 have 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. 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
- http://news.cnet.com/8301-17938_105-57559599-1/dxo-labs-tries-making-sense-of-camera-lens-sharpness/ DxO Labs tries making sense of camera lens sharpness
- DxO. "Camera Lens Database | DxOMark". www.dxomark.com. Retrieved 2017-03-22.
- http://www.dxomark.com/index.php/Lenses/Camera-Lens-Ratings/Optical-Metric-Scores Canon EF 300mm f/2.8L IS II USM mounted on Canon EOS 5Ds R