Question

what is photoneutral?

Answer 1

Wooden planks on a wall or floor with grain and texture. Light neutral tones. ivory off white paper texture. A black and white net neutrality concept imageconsisting of a knotted internet cable (Ethernet cable). This image can be used to represent the throttling of the internet by ISPs.

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Answer 2

A gray card is a middle gray reference, typically used together with a reflective light meter, as a way to produce consistent image exposure and/or color in film and photography. A gray card is a flat object of a neutral gray color that derives from a flat reflectance spectrum.