Thephoto cameras They are part of our daily lives as well as photographic production, and it is not something recent. We will see in the first place the evolution of it in the last decades, then the different types of cameras, their parts, characteristics and finally its operation.
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Evolution of the camera
Joseph Nicphone Nipce was the first photographer in 1825 with a camera made of wood, which despite being classified officially As the birth of the camera, the invention of the dark chamber was given before. In 1865 the first camera was known that could be classified as portable designed by Johann Zahn. Over time the cameras have become more powerful, portable and without a doubt the radical change was the digital photography whose first official record was of Kodak in 1975
Types of photo cameras
In reality, there are many cameras that exist and the same applies to the classification criteria that are innumerable. In any case, the following categorization is proposed:
Analgesic chamber It is a great category of photographic cameras, but where the central axis that characterizes them is the use of an active photosensitive material and its stabilization, so that what is processed from the images is obtained. That is, the capture and storage of photographs occurs in a chemical film.
35mm compact cameras The 35 mm as compact cameras are the most widespread in the world, standing out for its simplicity and because no advanced knowledge is needed for its use. They are inexpensive, their optical vision is direct and the objective is not interchangeable.
APS cameras His life was short and currently not used, but it was a result of the unification between the analog and digital system, highlighting that the record was given on a film, although digital information could be added.
SLR SLR Cameras It is a photographic camera in which the image seen by the photographer by the viewfinder is exactly the same as the one captured. The above is given by the reflection of the image on a system of mirrors or pentaprism. They can be cameras of photographic or digital film.
Less common cameras In this category are: the TLR camera, studio camera, miniature camera, panoramic camera, area camera, underwater camera, stereoscopic camera, Pocket camera and portable techniques and press type.
Digital camera It is a type of photographic camera that does not capture and store the photos in a chemical film, but instead goes to the digital photo so that the images are generated and stored. In modern cases they can record sound and / or video, so it's not just about photographs.
Web cameras (webcam) They are part of the category of digital cameras, only in this particular case they are small, not so powerful devices that connect to a computer and capture images and transmit them via the internet.
Parts of the photo cameras
Although the different types of cameras have varied over time, there are certain parts of the camera that remain and are invariable.
Body It is the box or the hermetic case with which the light is prevented from passing and which in turn contains each of the components of the camera. It can be said that it is the part that has evolved the most or has changed over the years.
Viewfinder It is the site where the image or what you want to capture is seen at the time of photography, therefore, it is the area that allows you to focus and frame the image. Provides a preview just before the trigger is activated.
- Optical viewfinder It is a viewfinder that is independent of the objective or slow, where its operation is related to the use of several lenses to produce an image of the scene that is in front of the camera.
- Rflex viewfinder It is characterized by using a set of mirrors called pentaprism and with it the image projected by the objective is shown.
- Electronic viewfinder It is basically made up of a small LCD screen in which the image is displayed and that gives a preview of what comes to the sensor for being in real time.
Objective or lens It is one of the most important parts and is a optical system made up of lenses that fulfill the task of giving a shape to the image that is sought to be captured and that is recorded by the sensor.
Trigger It is the mechanism with which the shutter is opened so that it is exposed to the light and that will operate the camera's operation.
Sensor It is the part that transforms the optical image that was created by the objective, so that it is a series of electrical type signals that gives rise to a digital image.
Diaphragm It is the device that is located inside the lens or lens with which the intensity of the light that reaches the sensor is graduating.
Focus ring It can be manual or automatic and with it the distance between the lens (lens) and the film is regulated, when moving the lens back or forth.
Shutter It controls the amount of time the sensor is exposed to light, so it also regulates the camera's light.
screen It is where the image is focused and projected. Its central characteristics are resolution and size.
Control buttons Through them the camera is configured, its parameters, functions, tasks are activated, among others.
Operation of photo cameras
At the moment when the camera button is pressed, the light of the object being photographed is going to enter through the camera lens. After that, it is the lens that is responsible for going to meet it at a certain point so that the image is formed there. In the case of analog cameras the point at which that image is going to be formed is in a film or a picture that is part of the photographic roll; for the digital cameras The point is going to be the sensor.
The previous process occurs at the moment of pressing the shutter or the capture button, since the film or the sensor is sensitive to light, the only thing necessary is that they are in contact with the light at the precise moment in which it is pressed . If it is not as described, what is being talked about is a video camera.
In the digital cameras You only need to connect the device to a computer and download the images when you want to save them. For the analog cameras It is different, since the film must be revealed or passed through a laboratory or store where they reveal photos, so that the roll undergoes a procedure in which the images go to the paper through a process with special chemicals.