Shutter Speed & ISO

shutter speed is the exposure to the digital sensor or film inside a camera. The shutter keeps the light out of the camera, until it is opened and exposes to create an image. In this example it shows how light effects an image, the more light in an image or capture through the view finder, the slower the shutter speed should be. For example in day light or more specifically a faster shutter speed should be used as there is too much light exposing an image. compared to being inside or in a low lit environment, in which a slower shutter speed should be used as it allows more light to expose an image creating in to be lighter

Shutter speed is also used to capture movement or to create a ‘Blur’ effect to simulate movement. often used in sport or for nature photography. A good example of a sports photographer would be Walter G. Arce, this photographer used a slower shutter speed to great motion in crashes during Nascar, using these techniques he also creates soft tones in tire smoke which create amazing and natural textures in races. Using a fast shutter speed stops movement creating a ‘still’ image, but using a slower shutter speed creates a ‘motion blur’ in which the subject is either in focus and the background has a motion blur effect due to the speed or action in which the subject in motion.

The ISO is used to help and work along side the shutter speed to correctly expose an image, The higher the ISO the lighter the image, and the lower the ISO the darker the image, a low ISO is used mostly outside and in well lit environments, and a higher ISO is used in darker environments. But the only difficulty in using a higher ISO is that it creates more grain or noise in the photograph.