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This is a physical requirement that ensures a picture displays the correct color & lighting. Requirement 1: Exposure / Image Brightness These two requirements provide a “road map” allowing you to create beautiful images and improve your photography on a consistent basis. The 2 Requirements of Successful PhotographsĮvery successful photograph has 2 fundamental requirements, each dependent of the 4 factors above. ISO DOES NOT change the sensitivity of the image sensor, EVER.ISO: ISO determines the in-camera amplification of light information (signal) produced by a specific scene luminance, f-stop, and shutter speed.Shutter Speed: Determines the amount of time the camera sensor is exposed to light from the scene.F-Stop: Controls aperture diameter, thus the amount of light passing through the lens which is then collected by the camera sensor.

The remaining three are controlled via the following camera settings:

Luminance is the only factor the outdoor photographer can’t control.

For example, sunny bright days have high scene luminance and dark scenes like twilight have low scene luminance. Luminance is an absolute value measured in candela per square meter (cd/m^2).

Scene Luminance (Light Intensity): The amount of light available in the scene being photographed.

This allows the photographer to evaluate each of the 4 factors, for any shooting scenario, thus determining the correct camera settings, producing the optimal image. The photography exposure triangle provides a methodical, step by step logic. This page requires a prior understanding of each setting, f-stop (controls aperture), shutter speed, & ISO, used to control the exposure triangle.Įvery photograph is controlled by 4 specific factors, each as important as the next. The 4 Factors Controlling the Exposure Triangle Click & Access the rest of my Landscape Photography Journals Videos.