Exposure & Metering
4 terms
Manual Mode
Exposure & Metering
A mode, marked M, in which the photographer sets aperture and shutter speed directly and the camera only advises.
Meter Calibration Constant
Exposure & Metering
cd·s/m²
The factor K in the exposure equation that ties a measured luminance to a recommended camera setting.
N² / t = L × S / K
Metering Mode
Exposure & Metering
The pattern a camera uses to sample scene brightness when calculating an automatic exposure.
Middle Grey
Exposure & Metering
% reflectance
The reference tone, reflecting about 18 per cent of the light that strikes it, that every reflected-light meter is calibrated to reproduce.
L* ≈ 50