ISO

ISO abbreviated for International Organization of Standardization. Most modern day camera have the option to change the ISO setting, Unlike in the film days where if you wanted a different ISO you had to take all the film out and insert a different ISO type film.

It is the ISO is a measure of sensitivity to light that the camera has. The higher the ISO the more sensitive the camera is to light. The problem is, the higher the ISO the more noise a photo will produce.

To show this I have taken 4 photos at different ISO settings to show how a low ISO number gives less noise and a high ISO gives more noise and quality loss.

125 400

1600 3200

You can see the clear difference between ISO 125 and ISO 3200, The 3200 Image has got a lot of noise on it, and the detail on the lettering has decreased. That is why whenever I shoot my photos I always use a ISO of 125 to make sure I get a noise-free image.

There are a few times that a higher ISO is necessary, such as when shooting in a dark environment and flash is not permitted or your flash isn't strong enough (When zooming in on something far away)