Fundamentals of Cameras and Optics

What is aperture?

Diameter of the hole inside the lens

What happens when you change aperture?

Amount of light let into the camera changes

Does a wide aperture let in more/less light?

Wide aperture lets in less light

What is the relationship between aperture and light?

Wide aperture (f/1.4) lets in more light
Narrow aperture (f/22)lets in less light

What is relationship between depth of field and background?

A shallow depth of field has a blurred background
A deep depth of field has a sharp background

What is f-stop?

f-stop is the ratio of the focal length of the lens to the diameter of the aperature

What is shutter speed? What does shutter speed have to do with light?

Shutter speed is the length of time the camera's shutter is open
Shutter speed controls the amount of light that reaches the sensor

What does shutter speed do in relation to light and motion

A slow shutter has more light, captures motion
A fast shutter has less light, freezes motion

What happens when you decrease shutter speed?

Decrease the amount of light let in

What is estimate of motion blur?

object velocity x shutter speed

What does a sensor do?

sensor (detector) captures the light

What are the paremeters of a sensor?

sensitivity (ISO), resolution