Text of Aperture, Shutter Speed and Depth of Field
PHOTOGRAPHY Introduction to: Aperture, Depth of Field & Shutter Speed
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
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!
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
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
SHUTTER SPEED It's how long the sensor/film in the camera is exposed to light Shutter Speeds: 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
EXPOSURE Exposure = Total amount of light which hits the film This is controlled by both the aperture & shutter speed
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!