Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Photonics Dictionary

exposure meter

An instrument used to measure the light from a scene to be photographed and to indicate the camera lens and shutter settings required to expose the film correctly. The exposure time required in a photographic camera depends on the sensitivity of the film, the brightness of the object and the f-number of the lens. The only uncontrolled quantity here is the object brightness, and a number of forms of exposure meter have been devised to determine this. The object brightness is measured by a photocell directed toward the scene, which may be arranged to determine either the average brightness or the brightness of a small area in the scene.
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,
x We deliver – right to your inbox. Subscribe FREE to our newsletters.