LO2: Photography definitions.

Aperture:

In photography the aperture is the measurement that allows or disallows light in through the iris of the camera. If the aperture is wide then it allows a lot of light in, if the aperture is small then not a lot of light will enter. Aperture is measured in a f/. If the f stop is f/16 it will let less light in compared to f/1.4 that will allow a lot of light in.

Shutter Speed:

The shutter speed is what determines the time the shutter stays open.

A slower shutter speed will result in a longer exposure time. Together the aperture along with shutter speed determine the amount of light reaching the sensor on the camera.  Shutter speeds are measured in fractions of a second or seconds e.g. ½ or 1/8000 .

ISO:

If the ISO is a low number, the camera will be less sensitive to light. However a higher ISO number results in a high sensitivity on the camera. The device in the camera which allows you to change the  sensitivity is named the image sensor.

If you lack light when taking a photograph, you would have to raise the ISO so it would capture more light. ISO’s such as 450 are used when there isn’t a lot of light.

Lens:

The lens is what allows the light to travel through the camera before it reaches the sensor. The different types of lenses have different properties and allow the user to have different zoom lengths. An example of a lens is a macro lens that is useful when capturing small details as it has a large zoom.