Friday, 22 April 2011

Use of Lenses

On the use of wide-angle lens gives sharp spacious room.  Unlike the use of telephoto lenses that have a narrow view of space.
Gain a wide-angle lens will produce sharp spacious room.  This profit is used to shoot by hand without looking at the viewfinder camera upwards and walk while estimating the angle of the target object.  This is usually used when shooting a photo journalist at close range during a clash in penghadangan position among the masses.  The second advantage with eyes that are not attached to the camera is able to see the situation around.  This can be avoided when there are stones or clubs.
Distance to Object
The closer the object, the sharpness will decrease, the contrary if the position is far from the object then kejamannya increasingly on the use of the same diaphragm

Aperture (diaphragm)

Aperture is a hole in the lens that regulates the intensity of light entering the camera.  The diaphragm is made of thin metal plates that form a round hole.  The size of this hole can be reduced or raised.  The smaller the hole the less light enters and sharp impact on the room spacious.  The bigger the aperture hole is more and more light coming in, but the sharpness of a narrow space.  The diaphragm is crucial role of space images sharp.
The size of the diaphragm aperture effect on the space sharply.  In a small opening was marked with a choice of large numbers in the diaphragm (f/11, f/16, F22).  Something that was in front and behind the main focus will appear sharp.  Means to minimize the diaphragm it will expand the space sharply.  While the large openings marked by a small number of choices on the diaphragm (f / 1.4 f / 2.8).  Objects that are in front or behind the main focus will appear blurry.  Decrease sharpness degradation takes place so far from the object will be increasingly blurred.
The use of root 2 as a benchmark to determine the sequence number of aperture diaphragm
1 to 1.4 - 2 to 2.8 - 4 to 5.6 - 8 - 11-16 - 22-32 now on conventional cameras and digital electronics, figures are not pegged to the number but more flexible again.

The diaphragm is usually written with the symbol f / and numbers, such as for example: 1.4 - 2 to 2.8 - 4 - 5.6 to 8 11 16 22 - ff.  So writing becomes f / 1.4 - f / 2 - f / 2.8 - f / 4 - f / 5.6 - f / 8 - f/16 - - f/22 - ff.
The more 'big' numbers diaphragm, then the 'small' hole formed diaphragm.  The more 'small' number of the diaphragm, the more 'big' hole formed diaphragm.
Figures diaphragm is obtained by dividing the focal length lens with diameter hole.  So for example the dotted fire lens has a hole 50 mm by 25 mm, the aperture f / 2.
Generally speaking, if the objects we potretterkena strong light, then the diaphragm must be installed in large numbers (eg f/16), whereas if the light is less, then we have to portrait with a small aperture (eg f / 2).
Diaphragm unit is usually called by the term f-stop.  While the difference between their masinng diaffragma is one stop.  For example if f / 2 we niakkan one stop, then the diaphragm is now the f / 2.8.

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