exponeringslängd

Exponeringslängd refers to the duration for which a digital sensor or photographic film is exposed to light. In digital photography, this is directly controlled by the shutter speed. A longer exponeringslängd allows more light to reach the sensor, which is beneficial in low-light conditions or when shooting with a narrow aperture. However, a prolonged exponeringslängd can lead to motion blur if the subject or camera moves during the exposure.

Conversely, a shorter exponeringslängd permits less light to enter the camera. This is useful for capturing fast-moving subjects without blur, or in bright lighting conditions to avoid overexposure. The interplay between aperture, ISO, and exponeringslängd forms the exposure triangle, which photographers use to achieve a correctly exposed image.

In astrophotography, very long exponeringslängder, sometimes measured in minutes or even hours through techniques like stacking multiple exposures, are common to capture faint celestial objects. In videography, the exponeringslängd is often linked to the frame rate, with a common practice being the 180-degree shutter rule, where the shutter speed is set to approximately half the frame rate to achieve a natural motion blur. Understanding and controlling exponeringslängd is fundamental to achieving desired creative and technical results in photography and videography.