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Terms starting with N

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Nano Coating Optics, Lenses & Filters A coating built from structures smaller than the wavelength of light, creating an extremely low refractive index layer that almost eliminates reflection. Native ISO Exposure & Metering ISO Any ISO value produced by real analogue gain in the sensor's readout circuitry, as opposed to numbers created by brightening the file in software. Negative Space Composition & Visual Design The empty or unoccupied area surrounding the subject, which gives it room and defines its shape. Neutral Density Filter Optics, Lenses & Filters stops (EV) A grey filter that reduces the amount of light entering the lens uniformly across all wavelengths, without altering colour. Stops = log₂(filter factor) New Colour Photography Genres, Movements & Theory The movement of the 1970s that established colour as a serious medium for art photography rather than a commercial or amateur one. New Objectivity Genres, Movements & Theory A German movement of the 1920s favouring clear, unsentimental description of the world, often in close-up and typological form. New Topographics Genres, Movements & Theory A 1975 exhibition and the approach it named, photographing the altered landscape — suburbs, industrial parks, car parks — in a deliberately neutral manner. New Vision Genres, Movements & Theory An interwar movement, associated with the Bauhaus, that treated the camera as a device for seeing in ways the eye cannot. Noise Floor Sensors & Digital Capture e⁻ (electrons) The level of background noise below which no real signal can be distinguished. Non-destructive Editing Post-Processing & Retouching An approach in which adjustments are stored as instructions rather than being written into the pixels of the original file. Nozzle Check Printing, Display & Output A test pattern printed to confirm that every ink channel is firing correctly. Nyquist Limit Sensors & Digital Capture lp/mm The highest spatial frequency a sensor can record correctly, equal to half its sampling rate. f_Nyquist = 1 / (2 × pixel pitch)