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Exposure Triangle for Beginners
Exposure Triangle for Beginners
The Triangle
The Triangle
The Exposure Triangle is made up from three things:
ISO
Is the SENSITIVITY of the sensor to light. This is based on when cameras used film.
SHUTTER SPEED
Is the DURATION of the exposure.
APERTURE
Controls HOW MUCH LIGHT goes through the lens to the film. This will affect the photos depth of field.
This is the first of the three exposure variables you will set.
It is associated with the quality and quantity of light in your shooting environment
In a bright light situation you will have to lessen the sensitivity of the cameras sensor.
In low light situations you would increase the sensitivity of the cameras sensor.
Aperture controls the AMOUNT OF LIGHT flowing through the lens to the sensor.
Aperture will therefore make an image more or less exposed.
Look at the diagram to see how much light is let into the sensor for each f stop.
Some photographers will use a low f stop to create close up images that emphasise the subject.
Some photographers will use a high f stop to create a photo where the subject and background are both in focus. This is helpful for forced perspective images. It was also used by the f.64 group which you can learn about under photographic movements.
Shutter speed controls the DURATION of the
Exposure.
A fast shutter speed will give a short duration. A slow shutter speed will give a long duration.
For this reason, shutter speed also controls
freeze and blur elements in a photograph. At times you will need a tripod to photograph because of shutter speed choices.
Shutter speed will also make an image more or less exposed. It is like blinking, the faster you blink, the less light will reach the sensor.
A fast shutter speed will take a 'freeze frame' photo.
A slow shutter speed can be used to create a 'motion blur' image.
A very slow shutter speed (several hours) can create a long exposure image like this one that shows the movement of the stars.
Quick Guide (Easy for phone use)
Quick Guide (Easy for phone use)
Exposure Triangle Guide.pdf
Class project: Exposure Triangle
Class project: Exposure Triangle
You are going to capture photos that show use of each part of the exposure triangle. To capture them, use the camera mode written next to the title (e.g. to capture a photo where you change the ISO, set the camera to P mode). If you have had experience with DSLR's before or are feeling extra brave, you could set the camera to manual mode (M). Complete the following images.
Note: These may not be the most bestest amazing looking photos you take. That is ok! You are doing this activity to learn how the camera works, not to create aesthetic final images.
QR For This Task
QR For This Task
Aperture Images (Av Mode)
Set camera to AV mode
Take three images the same subject or setting use a low, medium and high f stop (take a photo of something close to the camera with the background far away)
Low f stop (f4)
Medium f stop (f11)
High f stop (f22)
Shutter Speed Images
Set camera to M mode
Set Shutter ISO to 200, set Aperture to F4
Take three images of the same subject or settings using a slow, medium and fast shutter speed (e.g. 1 second, 1/50 and 1/250)
Shutter Speed 1/4 second
Shutter Speed 1/25 second
Shutter Speed 1/250 second
ISO Images
Set Camera to M mode
Set Shutter speed to 1/200 and Aperture to F4
Take three images that use three ISO (e.g. 100, 400, 1600)
ISO 100
ISO 400
ISO 1600
For Your Portfolio
For Your Portfolio
Insert & Respond
C level (ish)
C level (ish)
Create a page in your portfolio under called 'Exposure triangle.'
Insert the images that you have taken for this task.
Label your images with the camera settings you used.
To Find Camera Settings on Computer:
To Find Camera Settings on Computer:
Right click on image > select 'Properties' (last on list)
Go to 'Details' (top right tab)
Scroll to 'Camera' for camera details
B level (ish)
B level (ish)
Complete steps above
Tertiary: Write 2 or more sentences for each section (ISO, Aperture, Shutter Speed) that explain what these camera settings mean.
Accredited: Add dot points to your images that help you to understand ISO, Aperture and Shutter Speed.
A level (ish)
A level (ish)
Complete steps above
Tertiary & Accredited: Answer these questions:
-How might a higher ISO image (with more film grain) contribute to the meaning or feeling of an image?
-What type of image would you want a low aperture?
-What type of image would you want a high aperture?Tertiary: Research 'High Dynamic Range.' Explain what it is. Include APA references.
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