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Photography: how to use ISO values

In today's article we talk about photography, and precisely on the value of the optimization ISO depending on exposure or aperture.

We begin by saying that the term ISO indicates the standard to which we are referring to indicate the sensitivity of the internal sensor of the digital cameras in relation to light. In other words, by setting a low ISO value we will have a little light-sensitive sensor and a photo darker, vice versa (with the same aperture and exposure times) with very high ISO values ​​we will have a more sensitive sensor and a dramatically clearer picture (with some grain of digital noise in most, but more about that later).



Today's article is not intended as a survey or, neither a review nor a guide. On a recent visit by the parties of Saturnia, in an area where countries are very distant between them and the few roads that connect them are poorly lit at night.

If this was first aired a "danger" for us that we were (the usual nonsense of the genus: "and if you download the car battery?", "and if we end up off the road?") it is then translated into a Failure to light pollution, which made clearly visible Milky Way and most of the stars that "home" usually I do not see.