What is the relationship between contrast and sharpness?

The contrast is one of the most important parameters off photography and can decide on a recording about to be or not.

Such fluctuations in brightness to the human eye most noticeable. Where: A high contrast increases the effect of the subjective impression of sharpness. At the same time, however, from the actually existing, physical sharpness.

The contrast ratio refers to the intensity of the brightness difference. In everyday life, is the difference between day (light) and night (dark) is greatest. Photographers speak in such a case, a high / wide dynamic range. This difference in brightness adjusts automatically to the human eye by closing and opening of the pupil.

No matter how modern the camera is now, they can never capture the full dynamic range of nature completely in one take. What a contrast range and therefore severity is reached depends primarily on the digital camera used: an average compact camera offers about four stops. This covers such a device from an ISO range of between 50 and 800. Professional cameras usually work with ISO 25 to 1600 and offer more levels in the diaphragm, which opens a finer adjustment of the contrast range.

Title Post: What is the relationship between contrast and sharpness?
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