hamburger-nav-icon
region-flag-icon
Search by Category
Audio
Cameras
Cases & Bags
Computers
Conferencing
Content Management
Control
Displays
Furniture
Lighting & Studio
Mounts & Rigging
Networking & Cabling
Power
Presentation
Production
Residential
Security & Safety
Signal Management
Search by Manufacturer
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
#
Search by Category

Gossen

10 Mountainview Rd. Suite 320 South
Upper Saddle River, NJ 07458
United States
Sponsored Ad
Project List
Gossen Notes: What is an exposure value/EV ?
Posted on Thursday, May 5, 2011
 
Gossen Notes: What is an exposure value/EV ?

To make the handling Time/Aperture easier, the exposure value (EV) has been introduced.

Each step on the aperture scale corresponds to one step on the time scale. To hold the light quantity constant, you also have to change the aperture after having changed the exposure time. The graduation of both scales each corresponds to a double or a half of the light quantity.

One EV always corresponds to a certain light quantity and thus to a firm time/aperture ratio. EV 0 corresponds to aperture 1 at 1 s. If the camera permits the setting of an exposure value/EV, it will be very easy to give priority to the shutter speed or to the lens opening without having to calculate again.

close