EXPOSURE TRIANGLE

EASY way of understanding

1º THE APERTURE:

Aperture is a measure of how open or closed the lens’ iris is. A grater aperture or lower f-number, means that the opening is larger, therefore, wore light will enter. A smaller aperture or higher f-number, allows less light to reach the sensor.

Smaller apertures give a greater depth of field, allowing more of a scene to be in focus, for example, if you want to capt landscapes. Wider apertures create a narrow depth of field, which can help isolate a subject, for example, if you are doing a portrait.

2º SHUTTER SPEED:

Shutter speed is a measure of how long the shutter remains open and thus, how long the sensor is exposed to light. The faster shutter results in a lower exposure. Slower shutter speeds allow more time for the sensor to collect light and result in a higher exposure.

We want to have a high shutter speed to stop motion, for example, if we want to capture someone doing sport.

3º ISO:

Increasing the ISO essentially allows you to work with less light because the sensor is more light sensitive, however, the noise is increased and you get less detail.

Use a higher ISO number for low light conditions, sport, photography in action, etc.