Understanding Lens Contrast

Many photographers — even some experienced and knowledgeable ones — seem permanently confused about contrast, especially when the word is used to describe lenses. In photography, like the word 'speed' (which can refer to the maximum aperture of a lens, the size of the gap in a constant-rate shutter, or the sensitivity of an emulsion), the word 'contrast' actually refers to several different things. 'Contrast' in photo paper, for instance, or in a finished image, refers to overall (sometimes called 'global') contrast, meaning how the materials distribute tonal gradation from black to white or lightest to darkest.

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