Exposure meters measure brightness. Some measure the light reflected back from the scene and others measure the amount of light falling on the scene.
This chapter considers the matters to be taken into account when taking a reading and interpreting it on the meter’s scales.
In cinematography things are mostly simpler than with still photography. You still have shutter speed and lens aperture, but your shutter speed is nearly always the same, since it is primarily dictated by the number of frames per second the camera is set to run at.
For the cinema the standard frame rate is 24 fps (frames per second) and for television we shoot, in the United Kingdom, at 25 fps. Most cameras use a 180° shutter – that is, the ...