ISOsensitivitet

ISOsensitivitet refers to the sensitivity of a digital camera sensor to light. The term is derived from the International Organization for Standardization (ISO), which sets the standards for this measurement. A lower ISO number, such as 100 or 200, indicates lower sensitivity to light. This means that more light is required to achieve a properly exposed image, resulting in a cleaner image with less digital noise. Conversely, a higher ISO number, such as 800 or 1600, indicates higher sensitivity to light. This allows for shooting in darker conditions or using faster shutter speeds, but it also increases the amount of digital noise in the image, which can appear as grain or speckling. Photographers adjust the ISO setting to balance the need for adequate exposure with the desire for image quality. In bright daylight, a low ISO is typically preferred, while in dimly lit environments, a higher ISO may be necessary. Modern cameras often feature automatic ISO settings that adjust the sensitivity based on the available light. Understanding ISO is fundamental to controlling exposure and managing image noise in digital photography.