Download - 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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