Principles of Working Photography

Monday, December 10, 2018 : 10:08 AM

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The term photography has begun since the 19th century, more precisely in 1839 when Sir John Herschel introduced photography taken from two words namely: Photos and Graphein. The first term means light and the second means writing or drawing. This combination of two meanings gives the understanding that photography is a technique used by humans to describe a moment facilitated by light. Talking photography cannot be separated from related instruments, namely cameras.

The camera itself has been found quite old. The term camera itself comes from the Latin language camera obscura, where the translation is off, meaning it is a dark room. As you know if you remember the old documentary TV program, it was a story of taking photos using a camera equipped with an old tripod and a 35mm camera. Then the shots from this camera are continued with the process of washing the film print done in a dark and closed room. Why is that? Because the film used contains chemicals that are very sensitive to light, therefore printing the results of the camera should be done in a dark room.

Speaking of easy-to-digest optical science applications, let's look at one of the examples below.


1. Mirror or Pentaprism

2. The screen is transparent

3. Direction of Light (object)

4. A series of lenses

5. Camera body

6. Diaphragm

7. Film (sensor)

8. Viewfinder


The working principle of the camera is quite simple, namely playing the role of light and optics. In the chart above illustrated several important parts of a single lens reflection digital camera. This is where the role of natural science plays an important role in playing the interaction of light with a series of lenses that work systematically. The phenomenon of shooting can occur by playing the role of the shutter retaining button located on the top of the camera body. When this button is pressed halfway through, the camera will receive information on the object in front of the camera, then continue using a reflectance mirror or pentaprism to be forwarded to the viewfinder section. this part has a very important function, which is to reverse the image projection of the lens to fit the real object in front of the camera. Why does this happen? this can be explained based on the working principle of a lens, especially a lens that has two converging convex sides. This lens will produce a reverse image compared to the orientation of the real object. The characteristics of the lens are quite exotic where light can be deflected in the center of the lens and eventually come out of the lens body with the results of an inverted object orientation of 1800. taken, then the diaphragm is pressed further for execution of object retrieval. The consequences obtained geometrically with this step are that the mirror part rotates 900 and the information obtained by the lens will be forwarded to the film sensor section. This can happen by continuing the direction of light that is parallel and contains information on the object. Woalla is the picture

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