1. Exposure triangle Aperture Shutter ISO

2. Aperture The aperture is the size of the opening in the lens through which light passes

when the shutter opens The larger the aperture, the more light passes Aperture is measured in f-numbers e.g. f/2.0, f/2.8, f/4.0, f/5.6 etc. The larger the denominator, the smaller the aperture Depth of file is the degree to which the foreground and background are in focus A small aperture gives a large depth of field, and vice versa

3. Shutter The shutter speed is the amount of time the shutter stays open when taking a

photograph Short shutter speeds are for freezing a fast-moving object, such as wildlife, action

or sports Long shutter speeds are to blur a moving object e.g. water rushing over a

waterfall, and a tripod is usually needed to ensure the camera is held steady

4. ISO Measure of how sensitive the sensor of the camera is to light Represented numerically e.g. ISO 100 up to ISO 6400 and beyond At low sensitivities, more light is needed to achieve exposure i.e. low ISOs are

good for sunny environments and vice versa High ISOs have the disadvantage of producing grainy photos, so one would want

to keep the ISO as low as possible Beginners can use the auto-ISO mode to keep the amount of ISO as low as

possible

5. Modes Aperture priority Shutter priority Program Manual

6.