The usage of the lens aperture and skills
To photograph the creative photo, learn to control the aperture setting is required one lesson. Only master the skills to use aperture, can let the audience in the picture really feel good feeling of space.
The aperture of the digital camera is equivalent to the person’s eye in the iris. If a large aperture, there will be a lot of light into the image sensor; On the contrary, if the aperture is in the state of almost closed, then into the amount of light will be relatively reduce a lot. Numerical aperture is a ratio (score), expressed as 1:2. 8 or 1:5. 6 this form. Numerical aperture of the initial value is 1: (20 “x 2 1/2), the next number aperture is 1: (21 × 2 1/2), by analogy, the order of 1: (2 n-1 x 2 1/2). Numerical aperture is according to all the canon md150 battery
law of such calculated, each aperture of the amount of light into level is a half the number aperture. We can use f / 2.8 or F2.8 such form to say aperture value, involved in the shooting in the aperture of the range is generally F2.8 ~ F32.
If you think the aperture of the camera is used to control the exposure of, that you really ought to know about in photography of one of the most important skills, and that is the size of the aperture will directly affect the subjects depth of field size, or background completely clearly visible; Or very shallow depth of field, which appear on the part of the fuzzy pictures, thus let the pictures have stereo feeling.
In the model photography, as the lighting, the reasons of the personalities are left behind almost shadows. If point-blank sunshine strong, so the shadows of the form will be very obvious. In order to let the camera shutter speed to be in a suitable scope, professional photographer basically all will only use the amount of GaoJinGuang F2.8 at least more than large aperture. This large aperture, the light will usually will be enough.
In addition, large aperture can also achieve the second goal, this is can make of the depth of field become so shallow, this will make the photographs of the key is concentrated in to take on the character, the background also will thus become blurred. In the SLR, this effect through the viewing window camera can be directly observed. At the same time, in order to make photographs more bright, also need to control the aperture of the lens in the numerical range. So when you press the shutter release, the camera can use to preselected good number aperture to photos taken from the…….
But, just large aperture and not let each photo taken in the background are enough fuzzy. Because, this is, as long as the focal length approaches infinity (this on the camera with “∞” said), so in the photo in the infinite range far all can see objects, will clearly show that in the photos. So in shooting model, the photographer and models need to keep a distance. In addition, in order to make large aperture can realize the effect, still need to use telephoto lenses. Usually in model photography, need to use more than 300 mm in the long focal length.
In the portrait photography, still need to put the subjects and background to distinguish. But in this case, 85 mm or so the focal length of the is enough. This is because compared canon md160 battery
with model photography, portrait photography taken only need the head and upper body. Of course, also can go from model nearly some to achieve.
Let the background of the fuzzy method if want to let the background picture get fuzzy, through the following two kinds of method can be realized. 1. When shooting in the sun, need to shorten the time exposure can. For example, the exposure time from the original 1/60 SEC shortened to 1/125, this will make the aperture add a level, for example, from 1:5. 6 to improve 4-1.
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