Exposure: What Controls Exposure? Flashcards
What adjustment is made to lower the noise in a photo?
Lower the ISO.
What does each ISO number represent?
An increase (doubling) or decrease (halving) of the image sensor’s sensitivity to light.
What controls the amount of light traveling through the lens to the film plane?
The aperture.
What adjustment is made to decrease the depth of focus?
Lower the aperture.
What does each f/# represent?
A stop of light. The lower the f/, the lower the depth of focus.
What indicates the speed in which the curtain opens and closes?
The shutter speed.
How is shutter speed measured?
Fractions of a second.
What would be the difference between a shutter speed of 1/125 and 4/1?
1/125 would be quick and sharp, 4/1 would be slow with motion blur.
When combined, ISO, aperture, and shutter speed represent what?
Exposure value (EV) for a given setting.
What would changing just one element of the EV do?
Impacts the other elements so everything must be adjusted accordingly.
What determines the image sensor’s sensitivity to light?
The ISO.
