F-stop

An f-stop is a designation to indicate a camera’s aperture opening, and a flash unit’s power level. Our flash units are measured in power over a range of available f-stops, indicating the high or low power level setting of the unit. Each f-stop (shown on the back panel of our flash units) lets in twice as much light as the f-stop before it, and half as much light as the f-stop after it. Over a 5 f-stop range, the power is adjustable from Full down to 1/32 of the total power. For f-stops in relation to your camera’s lens opening, see aperture.

StudioLighting.net

About StudioLighting.net

A Free Online Resource for Studio Lighting and Photography Information: Tips, Tutorials, DIY Instructions, Reviews, and Much More.

Vintage Polaroid Sun 600 LMS Light Management System Instant Camera - Untested picture
Vintage Polaroid Sun 600 LMS Light Management System Instant Camera - Untested
Vintage Acmelite Photographers Light. Works picture
Vintage Acmelite Photographers Light. Works
VINTAGE  POLAROID WINK LIGHT MODEL 250 LAND CAMERA COLLECTIBLE FLASH picture
VINTAGE POLAROID WINK LIGHT MODEL 250 LAND CAMERA COLLECTIBLE FLASH
Vintage Sekonic Auto Lumi 86 Photo Light Meter  for parts or repair picture
Vintage Sekonic Auto Lumi 86 Photo Light Meter for parts or repair
Sylvania Sun Gun Movie Light model SG-1  Works Needs Bulb Prop Display Vintage picture
Sylvania Sun Gun Movie Light model SG-1 Works Needs Bulb Prop Display Vintage