Lighting & Flash
7 terms
Feathering
Lighting & Flash
Aiming a light so the subject is lit by the softer edge of its beam rather than its centre.
Fill Light
Lighting & Flash
f-stops (EV)
A secondary, weaker light or reflector used to raise the shadows the key light casts, controlling contrast.
Ratio = key / fill
Flag
Lighting & Flash
cm
An opaque black panel placed to block light from reaching a specific area.
Flash Duration
Lighting & Flash
seconds
How long a flash's burst of light actually lasts, which sets its ability to freeze motion independently of shutter speed.
t.1 ≈ 3 × t.5
Flash Exposure Compensation
Lighting & Flash
stops (EV)
An offset applied to TTL flash output, in stops, independent of the ambient exposure compensation.
Flash Exposure Lock
Lighting & Flash
A control that fires the metering preflash in advance and holds the resulting power setting for subsequent frames.
Flash Sync Speed
Lighting & Flash
seconds
The fastest shutter speed at which a focal-plane shutter is fully open, and therefore the fastest speed at which flash can light the whole frame.