Guide Number

What is it? A number used to calculate the f-setting (aperture) that correctly exposes a film of a given sensitivity (film speed) when the film is used with a specific flash unit at various distances from flash to subject. To find out the f-setting, divide the guide

Added By: Riley

Send To Friends!

If you'd like to send the Guide Number definition to yourself or to your friends/colleagues, just enter the e-mail addresses in the boxes below -

We hope you now understand the meaning of Guide Number. If you need any more information on this term, please don't hesitate to contact us.