Level of sensitivity of your camera to light in the environment. Higher ISO means more sensitivity to light, lower ISO means less sensitivity.
The duration for which the aperture will remain open. On an SLR camera the shutter speed can be adjusted. The numbers represent either seconds or fractions of a second. For example, 1 = 1 second, 15 = 1/15 second, 60 = 1/60 second, etc.
A variable opening inside a lens that regulates the amount of light reaching the image plane. Also known as an iris. (Camera/Lighting)
The amount of light per unit area (the image plane illuminance times the exposure time) reaching a photographic film, as determined by shutter speed, lens aperture and scene luminance.
Rule of Thirds
The picture is divided into thirds, no bullseyes
Object completely stopped, background clear
Object stopped, background blurred
Object Blurred, background clear
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