The term Peak Score is not used anymore on DxOMark. Ranking used to be provided using this Peak Score; now ranking is provided using the DxOMark Score.Former definition of Peak Score (now renamed as Mid-Light Score and shown in the lens measurement page):The Peak Score is the performance of a lens (with a camera body) for its best focal length and aperture combination. Therefore, it does not show how the lens behaves over its entire focal range. Other lens scores, such as Use Case and Optical Metric Scores, report average performances over the whole focal length and aperture ranges.Also, the Peak Score is measured for defined exposure conditions corresponding to typical studio photography with 5,000 lux illumination and an exposure time of 1/125s.dxoglossary
Wavelength of maximum absorption.