Lighting & Flash
3 terms
Gobo
Lighting & Flash
An opaque cut-out or template placed in a light's beam to cast a shaped pattern onto a subject or background.
Golden Hour
Lighting & Flash
degrees (sun elevation)
The period shortly after sunrise and before sunset when the sun is low, and its light is warm, soft and strongly directional.
Sun elevation ≈ 0° to 6°
Guide Number
Lighting & Flash
m at ISO 100
A measure of a flash's power, equal to the product of the correct aperture and the subject distance at a stated ISO.
GN = N × d