expozícióról

Expozíció refers to the amount of light that reaches the camera's sensor or film during a photograph. It is determined by three key factors: aperture, shutter speed, and ISO sensitivity. These three elements work together to create the final brightness of the image.

Aperture controls the size of the opening in the lens, allowing more or less light to pass through. A wider aperture (smaller f-number) lets in more light, resulting in a brighter image and a shallower depth of field. A narrower aperture (larger f-number) lets in less light, producing a darker image and a greater depth of field.

Shutter speed is the duration for which the camera's sensor is exposed to light. A faster shutter speed (shorter duration) allows less light in, freezing motion, while a slower shutter speed (longer duration) allows more light in, potentially blurring motion.

ISO sensitivity measures the camera sensor's responsiveness to light. A lower ISO setting means the sensor is less sensitive to light, producing a cleaner image with less noise, but requiring more light. A higher ISO setting makes the sensor more sensitive to light, allowing for shooting in darker conditions, but can introduce digital noise or grain into the image.

Achieving correct exposure is crucial for a well-balanced photograph. Too much exposure results in an overexposed image, where details in the highlights are lost. Too little exposure leads to an underexposed image, with lost details in the shadows. Photographers use these three settings in conjunction to achieve their desired level of exposure and creative effect.