type of LENS and uses function ~ PHOTOGRAPHY

type of lens and its uses function
The lens is the first filter media when we scan an image to be stored. Therefore a basic knowledge of digital camera lens is very necessary. The camera lens is didiesain use computers to improve accuracy. To increase the sharpness of the lens, the lens is coated with certain chemicals.

Views differences of opinion between the lens:

Here are some common types of lenses used on digital SLR cameras:

A. Prime lenses (fixed)
primes have enlarged the picture and perspective that can not be changed .. for example: 14mm lens f / 2.8 and 50mm lens f / 1.4
example primes lense

B. Zoom Lenses (vario)
A zoom lens is a combination of all three types of standard lens, wide angle lens, and telephoto lenses. The size of the lens is not a fixed size, but rather a certain range of the lens, eg 80-200 mm. This type of lens is the lens of the most widely used because it has a character that is flexible and wide range of lenses is enough. Thus, if you want to use a certain size lens users stay rotate the lens size as needed.
example:
lens 18-70mm f / 3.5 to 3.4
lens 18-135mm f / 3.5 to 5.6
lens 70-200mm f / 2.8
whereas vario lens is divided into 3 according to the lens focal length, namely:1. wide angle lens (wide lens)
Wide angle lens is a lens that is used to capture large objects in the viewfinder field is limited. The character of this lens is to make objects smaller than actual size. The size of this lens is varied, including: 17 mm, 24 mm, 28 mm and 35 mm. Besides, there are also wide-angle lens with a diameter of 14 mm, 15 mm and 16 mm. The lens is called a fish eye lens lens.
Caption this lens:
lens has a focal length of 28mm is not limited to,
(+) Takes a broader perspective, sharply wider space
(-) Barrel distortion is quite high, making it less suitable for shooting a model, because the result in part of the body such as the larger models .. (If you want to photograph models which do not use it later visible fat)
Image to the right nokon 18mm-55mm

2. Lenses Normal / standard
Standard lens is a lens that becomes a standard component of the camera. The size is 50 mm. The character of this lens is to provide natural shots. These lenses are suitable for medium-range shooting.
Caption this lens:
has a 35-70mm focal length, has a point of view + - the same as the human point of view (+ - 45 degrees)
(+) No distortion
(-) Normal (not special)
This lens is suitable for documentation / photo

Nikon 35-70mm f/3.5

3. Tele Lens
Telephoto lens is the opposite of wide angle lens. Telephoto lens to zoom function, but the narrow viewing angle. Which includes a telephoto lens is a lens with a size of 70 mm and above. Another function of telephoto lenses is to make croping and focus on a particular object and blur the objects in the vicinity.
Caption this lens: This lens has a focal length between 80mm-infinite is the opposite of this lens wide lens
(+) Close to distant objects
(-) Space is more narrow sharp, distortion pinchusion
This lens is suitable for shooting models, sports, concerts, paparazzi
Figure wide range telephoto lens:

C. Macro Lens
Macro lenses are usually used to target small objects. In this digital camera, macro-scale enlargement done digitally and not be done optically. All types of lenses have the same characteristics, namely the smaller the size of the lens, the more wide-angle that can be reached by the camera.
Example macro lens and photograph

D. Lens PC (Perspective Correction)
Having the ability to correct perspective, commonly used for architectural photography

E. Fish eye lens
This lens has a 180 degree angle of view and usually lenghtnya 16mm focal length. This lens produces effects such as fish eye view (convex)