What is a diaphragm?

diapraghmaDiscussion on the article a little earlier photographic techniques I describe on Shutter Speed, the thing that determines the speed in closing and opening a curtain / shutter. Okay, now I will discuss the second step that must be mastered to use the advanced DSLR.

In this second article I will discuss about the diaphragm or Aperture or Aperture too. If Shutter Speed determines the speed of opening and closing a curtain / shutter, the diaphragm or Apeture this is what determines the opening of the lens.
In some cases, the same function with Shutter Speed, which is conditional on acquisition of a light so as to produce an object that does not over-exposure / too light or under exposure / minus light.



Each type of lens has a diaphragm that is not always the same. Depending on whether it is wide lense, zoom or a telephoto lense. And sometimes the level of the lens itself determine the facility's own Aperture. Such as the Canon L Series usually have Aperture larger than usual series on bermilimeter same lens.
Apeture itself very influential on the sharpness of images in the foreground, background or the object itself. Or the language of photography affect depth of field / DOF / Space sharp on the resulting image. For more details like this, try to see the picture below.
You see that there are several stages in the lens aperture, the DSLR is inversely proportional to the number of openings, this means if the first digit indicated that mean aperture 1.4 aperture 1.4 is the greatest, and if the last digit listed 16 so it was an opening the smallest.

What is a diaphragm? photography techniques
The simple explanation like this, even large openings precisely will result in DOF / sharpness of the small room, say 1.4, the applied rate will result in a sharp little space, in the sense of focus that was captured by the camera may only be obtained when the object itself, while the foreground and background will miss focus. Therefore, large openings suitable for objects near and macros, but sometimes the photographers use large openings to produce bokeh / bg-blur that makes a photograph interesting. Very small aperture will produce DOF / sharpness of the large room, for example applied to the number 22, it will produce a sharp space great. In the sense of focus will be obtained in the foreground, background objects at once. Now, a small opening is perfect for taking photographs of landscapes.