Today the same principle applied in the sensor of a digital camera. Look less sensitive lower ISO setting on a digital sensor is too light and the need for more light (variable Aperture or shutter speed) of a photo is well exposed.
It is important to realise that, while major Adjusting ISO to shoot against a background of low or in the hinterland and the exhibition also suits, enemy of digital (and film) has allowed photographers from a high ISO "noise" adjustment value. The sound is produced as a by-product of the use of a more sensitive sensor and can see pictures with carabus. This is particularly relevant when expanding an image.
In the case of the right, but the noise that can be used for creative purposes (e.g.) (when you try to take a picture of the larger art black and white image representation often put some sounds). It is a delicate balance, and too much noise can ruin your photo.
It is also important to note that a lower ISO settings, with a digital camera, usually used more memory to store the image (it may be relevant if little space is run on the map).
Usually, unless I see that noise with a particular effect (effect, add a "grain", such as an image) or wishing to use shooting and lighting of flash, my goal is to use the lowest possible ISO value for the highest quality of my pictures. Enlarge the image without having to worry about the noise that disturbs the quality in the future.
A setting of ISO can view digital cameras more manual for advice as a whole based on the specific camera settings.
You must try to understand that different ISO settings under other circumstances is the best results. Vote for knowledge on configuring ISO front allows you to correct circumstances of configuration and have fun!
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