The document introduces aperture, depth of field, and shutter speed as they relate to photography. It explains that aperture is the size of the lens opening and controls the amount of light entering the camera. A larger aperture admits more light and results in a shallower depth of field where only the subject is in focus. A smaller aperture admits less light and produces a larger depth of field where the subject and surrounding areas are in focus. Shutter speed determines how long the camera sensor is exposed to light and must be adjusted based on lighting conditions to avoid under or overexposure. Aperture, depth of field, and shutter speed all interact to control the exposure of the photo.

1. PHOTOGRAPHY
Introduction to: Aperture, Depth of Field & Shutter Speed

2. WHAT IS APERTURE?
• The aperture is the size of the lens opening
• It controls the amount of light that is let in:
• A larger aperture lets in more light
• A smaller aperture lets in less light

3. APERTURE
• The smaller the f/number, the larger the opening
• The larger the f/number, the smaller the opening
f = Sign for aperture
The F word!

4. IMPORTANCE OF APERTURE
How can it change what your picture looks like?
A larger aperture (lower f/number) will have your
subject in focus, and everything in front of and
behind it blurry.
A smaller aperture (higher f/number) will have your
subject in focus and everything in front of and behind
it quite focused as well.
Also known as Depth of Field

5. DEPTH OF FIELD
Large aperture = Shallow depth of Field Small aperture = Large depth of Field
• Large depth of field = much of the
image is sharp and in focus.
• Shallow depth of field = only a small
part of the image is sharp and in
focus.
There are three things which can change
the depth of field:
1. The aperture
2. The focal length of the lens used
3. How near the subject focussed on is to
the camera

6. SHUTTER SPEED
• It's how long the sensor/film in the camera is exposed to light
• Shutter Speeds:
½ ¼ 1/8 1/15 1/30 1/60 1/125
• This depends on how much light there is
• If the shutter is open too long, the picture will be too bright, and if it's not
open long enough, the scene will be too dark
Also known as Exposure

7. EXPOSURE
Exposure
= Total amount of light which hits the film
This is controlled by both the aperture & shutter speed

8. REVIEW
What have we learnt?
• Aperture use = f sign
• Depth of field = focus of the image
• Use of shutter speed = fractions
• Exposure = total amount of light
They all connect!