Light Meter Concepts

Front

Incident light meter reading

Back

Meter with invercone pointed at camera from subject

Front

Invercone

Back

White plastic dome over light-sensitive cell

Front

Invercone light transmission

Back

Transmits 18% of light to meter

Front

Reflected light meter reading

Back

Meter pointed at subject from camera

Front

Angle of acceptance

Back

Equivalent to a normal lens; reduced to 5 degrees with spot meter

Front

Flash Meter labelled

Back

Diagram of a flash meter with labeled parts