Exposure, Aperture, Shutter

EXPOSURE

What is Exposure?

“The total amount of light allowed to fall on the photographic medium during the process of taking a photograph”

More light = Brighter that area Color Sun vs Moon over beach

Exposure Triangle

Controlling exposure

We control how much light is let in ISO Shutter Aperture

“Stop”

Brightness is measured in Exposure Value “EV” or f-stops

Step up – doubling Step down- halving What you see may

not be what you get

Light Meter

Experiement

Put camera on MANUAL mode Find controls to

adjust the 3 exposure points

Set camera to AUTO find various lighting

situations and look through viewfinder and hold down the shutter half way to see what the camera has set

Back in MANUAL mode Same scenes as

before, adjust up and down a few f-stops and note the difference

Purposely over or under expose for artistic experiment

Aperture

“an opening” Can be adjusted

(open or close) to control light let in Iris and Pupil

f ratio f2.8 f22

f ratio sequence in stops 1 1.4 2 2.8 4 5.6 8 11 16 22 32

Aperture

Aperture

Depth of Field Region of photo

that is in focus Larger the Aperture

(small f/#) Smaller the

Aperture (large f/#)

Depth of Field Examples

Wide Depth of Field = Large f/#

Depth of Field Examples

Narrow Depth of Field = Large f/#

Experiment

Find interesting things that are at many distances from you. Photography with

different apertures and keeping photo with correct exposure

Find a small object against a background Adjust aperture to

isolate the subject from everything else

Find a house or landscape and adjust accordingly to have the whole photo in focus

Shutter

Fast Freeze motion in time

Slow Show motion

Longer shutter Ex. Make moving

water look fluffy Long exposure at

night Can capture image in

dim lighting

QUIZ!

Shutter- Fast or Slow? Aperture- Big opening or little? Point of view? (worms eye, normal, birds

eye) Composition (principle/elements of art) Rule of Thirds? What does the photo say to you? How

does it make you feel?

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