Let’s take a closer look at these terms and what options they have when shooting.
For starters take a look at the schema that defines the values that we expose in manual mode on our camera.
The exposure for the shot
Exposure directly affects the tones of the subject. A small exposition of acts thus on the that turns very dark image (underexposed) which are not present crisp details sometimes not even in the darkest of objects, photography, and very often they are missing in the photo. On the contrary – very big exposure leads to the fact that the snapshot is the lack of detail in bright objects shooting (overexposure), and often complete their limit.
Thus, we can say that the exposure should be set so that it is possible with a certain sensitivity to obtain the necessary amount of light to show the maximum range the important details of the plot to a certain extent. It is important to know that the higher is the sensitivity matrix of photocells, the less value you want for the picture exposure.
Iris (used in modern devices), and is usually made of several rotary lobes, which begin their movement through a special ring on the lens. The effect of a fully open aperture – a circular opening. Otherwise, the polygon (when partially closed). The most popular among photographers and videolyubiteley are the diaphragm, which are composed of more than 8 petals.
The value of the exposure is the amount of time when the light reaches the sensitive matrix, and is one of the 2-h of exposure.
You need to consider the fact that modern SLR cameras are the standard values of the extracts, which are specified in fractions of a second. In addition, the numerator is modified for very short exposures (less than 1 sec.) and thus, the shutter speed becomes the denominator:
2 (1/2 sec.)
4 (1/4 sec.)
8 (1/8 sec.)
15 (1/15 sec.)
30 (1/30 sec.)
60 (1/60 sec.)
125 (1/125 sec.)
250 (1/250 sec.)
500 (1/500 sec.)
1000 (1/1000 sec.)
2000 (1/2000 sec.)
4000 (1/4000 sec.)
8000 (1/8000 sec.)
ISO standards exist in order to avoid differences in their interpretation, and for clarity of perception of the material by normal users.
Today for measuring the light sensitivity of photographic materials used special ISO 5800:2001.
In order to make that picture that you really need, you need to study the effect of all key parameters of your device, such as shutter speed, exposure, aperture and ISO as the joint use can improve the picture and degrade it.