In Photography, there is an Exposure Triangle (Reciprocity Theory) Aperture – size of the iris opening, how much light come into the “window”

Shutter Speed – length of time the image is exposed, how long light comes into the “window”

ISO setting – sensitivity of film (sensor) to light

In Video, the shutter remains set Shutter Speed – length of time the image is exposed.(Standard – 1/50 sec or twice the frame speed)

Frame Rate – length of time between each exposure.(NTSC Standard – 24 fps or 1/24 sec)

After Image – the human eye retains the impression of an image slightly longer than it is exposed to it. Without a visual break between exposures, the images would be seen as a blur.

In Video, there are other options for adjusting exposure Neutral Density filterOff for no density filter¼ cuts light intensity by up to about ¼1/16 cuts light intensity by up to about 1/161/64 cuts light intensity by up to about 1/64

Gain (like ISO) – amplifies the image artificially, does not increase the sensitivity of the sensor, causes visual noiseL (0db) best dynamic rangeM (6db) increases the image amplifierH (12db) increases image amplifier more

Exposure Decision Steps

1. Make an Aperture - Priority decision by adjusting the camera iris according to your desired Depth of Field.

2. If image is overexposed, add Neutral Density filter to cut the amount of luminosity hitting the sensor. Try to keep your Gain Low, if possible.

3. If image is underexposed, switch the Gain Level to amplify the image, but expect increased image grain.