Photometric ( luminous) exposure
Description
In photography, exposure is the amount of light per unit area (the image plane illuminance times the exposure time) reaching a photographic film, as determined by shutter speed, lens aperture and scene luminance. Photometric or luminous exposure is the accumulated physical quantity of visible light energy per area applied to a surface during a given exposure time.
Related formulasVariables
| H_ν | The luminous exposure (lux*seconds) |
| E_ν | The image-plane illuminance ( flux incident on a surface, per unit area) (lux) |
| t | Exposure time ( the length of time a camera's shutter is open when taking a photograph) (sec) |