Tutorials:
|
ISO Speeds
For those familiar with film, ISO (International Organization for Standardization) is a
standard for measuring light sensitivity which happens to function
the same way with digital as it does with film. The higher the ISO speed, the more sensitive
the sensor is to light – and the more “digital noise” increases. Noise is roughly equivalent
to “grain” in film images. Grain can be used to artistic effect, and can be a desirable
effect. Unfortunately, the same is not true of noise. Noise is an entirely unattractive trait
, and one that can be difficult to avoid. ISO is expressed in numbers, usually from ISO 50
to ISO 400 or ISO 800 on consumer digital cameras. Following you can see two examples – the
first is one with a low amount of noise (low ISO), and the second with a high amount of
noise (high ISO).
|
|
|
