That it is the diaphragm? In photography it is understood by diaphragm like a circular opening, is located within the objective. This opening is not fixed, its diameter can vary more or less allowing therefore the entrance of light towards the sensor of the camera. It is obvious that at greater opening greater amount of light will arrive and vice versa. By ponerte a resemblance could say to you that it works just as the rainbow of the human eye with the difference that the photographer can indicate the value of the opening of the diaphragm. More information is housed here: Israel Englander. In order to fit it, the objective has a control ring where you find a series of denominated points F or is possible to be fit from the own body of the camera depends on the objective or marks at issue. Points to consider with respect to the diaphragm? These numbers are fractions that indicate the diameter of opening of the diaphragm. For example f: 5,6 are in fact 1 5.6 for that reason, whichever major is smaller number F will be the opening and therefore smaller amount of light arrives at the sensor. When you change of a value of diaphragm to its immediate superior or inferior, a step is denominated to him of diaphragm, in the photographic slang.
We have said although it already, to major I number F smaller amount of light? Smaller number F for example F 2.8 greater light will enter So that it serves the diaphragm? It controls the exhibition of a photography in combination of the values of speed of clogging. From creative form, with a closed number F you obtain major depth of field or said of another form greater zone in a focused photo. To inverse with an open number F the F2,8 type one takes place selective approaches Complementary articles that you can be useful to understand that it is the diaphragm. The video that you will see in the following connection is quite good, although you must consider that it is done in the beginnings of the photography and there are things that they have changed..