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In digital photography, exposing to the right (ETTR) is the technique of adjusting the exposure of an image as high as possible at base ISO (without causing unwanted saturation) to collect the maximum amount of light and thus get the optimum performance out of the digital image sensor. The name derives from the resulting image histogram which, according to this technique, should be placed close to the right of its display. Advantages include greater tonal range in dark areas, greater signal-to-noise ratio (SNR), fuller use of the colour gamut and greater latitude during post-production.

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  • In digital photography, exposing to the right (ETTR) is the technique of adjusting the exposure of an image as high as possible at base ISO (without causing unwanted saturation) to collect the maximum amount of light and thus get the optimum performance out of the digital image sensor. The name derives from the resulting image histogram which, according to this technique, should be placed close to the right of its display. Advantages include greater tonal range in dark areas, greater signal-to-noise ratio (SNR), fuller use of the colour gamut and greater latitude during post-production. The direction of the relative adjustment to the camera's meter reading depends on the dynamic range (or contrast ratio) of the scene. Typically, with low-contrast scenes, an increase in exposure over that indicated by the camera's meter will be required. When attempting a single-exposure of a high dynamic-range scene, a reduction in exposure from the meter's reading may be needed. In the final analysis, however, the camera's meter is irrelevant to ETTR since the ETTR exposure is established, not by a meter reading, but by the camera's exposure indicators, the histogram and/or the highlight-clipping indicators (blinkies/zebras). ETTR images requiring increased exposure may appear to be overexposed (too bright) when taken and must be correctly processed (normalized) to produce a photograph as envisaged. Care must be taken to avoid clipping within any colour channel, other than acceptable areas such as specular highlights. The principle is also applied in film photography in order to maximize the negative's latitude and density and achieve richer blacks when the image is printed slightly down. (en)
  • Nella fotografia digitale, l'ETTR (dall'inglese Expose To The Right, cioè "esporre a destra") è una tecnica con la quale si incrementa l'esposizione di un'immagine per raccogliere più luce possibile e quindi ricavare le migliori performance dai . Il nome deriva dall'istogramma di un'immagine risultante, il quale, secondo questa tecnica, dovrebbe situarsi sulla destra del grafico. I vantaggi comprendono una maggiore gamma tonale nelle aree scure, un rapporto segnale- più elevato (SNR), sfruttamento totale del Gamut colori e una maggiore latitudine di posa in post-produzione. Le immagini scattate tramite l'ETTR appaiono sovraesposte e devono essere elaborate correttamente per ottenere la giusta esposizione, ponendo attenzione all'evitare il clipping dei singoli canali colore, tranne nelle aree in cui le bruciature delle alte luci sono volute (riflessi speculari). Il principio si applica anche alla fotografia su pellicola per massimizzare la latitudine di posa del negativo e l'assorbanza, ottenendo così dei neri più profondi quando l'immagine viene stampata volutamente sottoesposta. (it)
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  • In digital photography, exposing to the right (ETTR) is the technique of adjusting the exposure of an image as high as possible at base ISO (without causing unwanted saturation) to collect the maximum amount of light and thus get the optimum performance out of the digital image sensor. The name derives from the resulting image histogram which, according to this technique, should be placed close to the right of its display. Advantages include greater tonal range in dark areas, greater signal-to-noise ratio (SNR), fuller use of the colour gamut and greater latitude during post-production. (en)
  • Nella fotografia digitale, l'ETTR (dall'inglese Expose To The Right, cioè "esporre a destra") è una tecnica con la quale si incrementa l'esposizione di un'immagine per raccogliere più luce possibile e quindi ricavare le migliori performance dai . Il nome deriva dall'istogramma di un'immagine risultante, il quale, secondo questa tecnica, dovrebbe situarsi sulla destra del grafico. I vantaggi comprendono una maggiore gamma tonale nelle aree scure, un rapporto segnale- più elevato (SNR), sfruttamento totale del Gamut colori e una maggiore latitudine di posa in post-produzione. (it)
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  • Exposing to the right (en)
  • ETTR (it)
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