Viewfinder is the name given to the device that allows a camera to focus to take photos or define the aim of a firearm. For example: “Look at the viewfinder if all the models appear in the image”, “I didn’t have time to look at the viewfinder: I just took the camera and started shooting”, “The shooter was motionless for two hours, looking through the viewfinder with finger on the trigger.”
In the field of photography, the viewfinder helps to frame the field of view. It is a frame or screen that the photographer can observe to have an approximation to the result of the photo.
Cameras may have an electronic viewfinder, a screen, a reflex viewfinder, an optical viewfinder, or a viewfinder frame. Digital cameras, very popular since the arrival of the 21st century, usually have an electronic viewfinder, which is a screen that shows the photo. Of course, we must not forget that the helmets used to ride a motorcycle also have a visor. Its main function is, in addition to allowing the driver to see, to ensure that their eyes are not damaged for any reason. That is, it prevents them from affecting dust particles to insects through any other adverse element. Precisely because of the important function it performs, it is essential to keep the screen in perfect condition. And that means both washing it frequently, with soap and water, and avoiding leaving it anywhere on the helmet to avoid scratches. By extension, it is known as a viewer for various devices that, in household appliances and other machines, display information of interest to the user. The screen of a microwave oven, to cite one case, can show the time, the cooking time and the power. In the field of weapons, the idea of a scope is linked to the concept of a crosshair: a piece used to fine-tune the aim. There are weapons that have a telescopic sight to increase the size of the target that is focused, a feature that helps the shooter to have greater precision at long distances. Likewise, we cannot ignore the existence of Visor Libros, which is the name of a publisher with more than four decades of work. It is an entity specialized in poetry and has such important collections as those that revolve around Nobel laureate Juan Ramón Jiménez or Mario Benedetti, among others. In addition, it is necessary to point out the existence of what is called a cartographic viewer. Basically we can say that it is a web resource that exists in Spain and is responsible for providing data related to the Urban Information System (SIU). Thanks to it, any citizen can access those that refer to maps of the country in different areas and at different levels.
