Aperture, Shutter Speed and Depth of Field
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  • 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!