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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.〔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 Labs claims that P-MP is a more accurate and relevant value for photographers to consider when weighing-up camera sharpness.〔http://petapixel.com/2012/12/17/perceptual-megapixel-mtf-charts-boiled-down-to-a-single-number/〕〔http://photo.net/photography-news-forum/00b9IO〕〔http://timgrey.com/blog/2013/dxomark-introduces-the-perceptual-megapixel/〕〔http://news.cnet.com/8301-17938_105-57559599-1/dxo-labs-tries-making-sense-of-camera-lens-sharpness/〕 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.〔http://www.dxomark.com/index.php/Lenses/Camera-Lens-Ratings/Optical-Metric-Scores Camera Lens Ratings by DxOMark〕 ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Perceptual MegaPixel」の詳細全文を読む スポンサード リンク
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