n. the frustration of photographing something amazing when thousands of identical photos already exist—the same sunset, the same waterfall, the same curve of a hip, the same closeup of an eye—which can turn a unique subject into something hollow and pulpy and cheap, like a mass-produced piece of furniture you happen to have assembled yourself.

In photography, acutance is the edge contrast of an image. Acutance is related to the amplitude of the derivative of brightness with respect to space. Due to the nature of the human visual system, an image with higher acutance appears sharper even though an increase in acutance does not increase real resolution.