Exposure

Aperture / FStop

Shutter Speed

ISO

Composition

Rule of Thirds

Camera Icons

The amount of light allowed to fall

on to the image sensor in a digital

camera, which is determined by the

length of time the shutter is open and

how wide the lens is allowed to open

(aperture).

It is the combination of the intensity

and duration of light

The three fundamental elements

of exposure are aperture, shutter

speed and ISO

The Exposure Triangle

The aperture is the hole at the center of

your camera’s shutter.

The size of the lens opening is often stated

in the form of f/2, f/5, f/11, etc.

Smaller f number

Wider aperture opening

More light

Blurred background

Higher f number

More of your photo in focus.

Less light

Sharper background.

The amount of time your camera’s shutter

is open allowing light to hit your camera’s

light sensor.

Your shutter speed will have an effect on

the sharpness of your subject.

Lower shutter speeds let in more light, but

make your image susceptible to blur and

requires a steady hand or tripod.

Faster shutter speeds let in less light, but

can give you a sharper subject

ISO controls how the sensor responds to

the light it receives from the shutter and

aperture.

High ISO = more sensitive to light

Low ISO = less sensitive to light

Generally speaking, you’ll want to keep

ISO as low as possible as increasing the

ISO also increases noise.