Chapter 6- Key Terms

A sensor eye in the flash monitors the light and once the right volume of light has been received for a proper exposure, the flash turns off

automatic flash exposure mode

An electronic flash unit designed to work with a specific camera, where the camera and the flash share information to ensure a proper exposure

dedicated flash

Flash technique used to lighten details in deep shadows while the remaining areas are brightly lit by ambient light

fill flash

Value on the LED screen of a flash unit that help the photographer determine the proper f/stop for flash to subject distance

flash calculator dial

An indication of the relative power of a particular flash unit

guide number

Light diminishes by the inverse square of the distance traveled

inverse square law

When the flash goes off, exposures are determined by altering the aperture of the lens or the intensity of the flash for the distance of the flash to the subject

manual flash

When a dusty surface is walked on and the shoe or foot removes dust in the shape of the shoe or foot

negative dust print

An average sized living or bedroom with white ceilings about 8-9’ tall and light colored walls

normal room

Flash used at different angles, usually to produce side-lighting shadows

oblique flash

A technique used to light a large, dim scene with multiple flashes while the camera has the shutter locked open

Painting with light

A coiled electronic connection between the camera body and a flash unit being used off the camera

PC cord/ remote flash cord

When a dusty shoe leaves its residue on a relatively clean surface

Positive dust print

A spray to put on snow impressions because it provides contrast and covers the print in a waxy substance, better preparing it for casting

snow print wax

300,000 meters/second or 186,000 miles/second

speed of light

The shutter speed at which cameras be set whenever electronic flash is used

sync speed