DxO Labs tries making sense of camera lens sharpness
Aiming to make it easier for photography enthusiasts to evaluate photo gear, DxO Labs today announced a new method of measuring lens sharpness it hopes will make more intuitive sense.
The idea, called the perceptual megapixel, shows how much of a camera's original sensor resolution a particular lens can preserve when factors such as lens sharpness, optical defects, and sensor pixel size are taken into account.
One example the company provides: on a 21.1-megapixel Canon 5D Mark II, the Sigma 35mm F1.4 DG lens gets a score of 17.2 perceptual megapixels and the much higher-priced Carl … Read more