chauncey said:I am truly puzzled when acutance is defined as "the sharpness of a photographic or printed image."the 5DS R is the king of resolution whereas the 5D IV has better acutance
Is that not basically the same as king of resolution?
Acutance in simple terms refers to the edge sharpness of a transition from say dark to light. Resolution depends on distinguishing finely spaced details. Larger pixels in a lower resolution sensor give the illusion of a sharp transition and can make an image appear sharp whereas finely spaced small pixels in a high resolution sensor smooth out transitions. The finely spaced small pixels resolve small features better. In a similar fashion, downsizing makes images look sharper although at the same time losing resolution.
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