flash factor

[′flash ‚fak·tər]

(optics)

In photography using a photoflash lamp, a number dependent on the lamp and the film speed, equal to the product of the distance of the lamp from the subject and the correct f-number for that distance.

References in periodicals archive ?

Adding to the flash factor is extensive use of clear-coated silver carbon fiber mat.

Hi ho, silver! away! All flash and all substance, formula's 290 FX4 adheres to its own creed

The hunt in the cupboard under the stairs for the sledge, and the joy of discovering when it can't be found anywhere that a tea tray is almost as good, even if it lacks the flash factor in the local park.

CASSANDRA: All white now; Say goodbye to the grey.. and enjoy the icy proof that all's well with the seasons again

You can also easily adjust the flash factor by using smaller-diameter Mylar on the fly's back.