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camera is an optical instrument for recording images, which may be stored locally, transmitted to another location, or both. The images may be individual still photographs or sequences of images constituting videos or movies.



The word camera comes from camera obscura, which means "dark chamber" and is the Latin name of the original device for projecting an image of external reality onto a flat surface.



The modern photographic camera evolved from the camera obscura. The functioning of the camera is very similar to the functioning of the human eye.



A camera may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A still camera is an optical device which creates a single image of an object or scene, and records it on an electronic sensor or photographic film.



All cameras use the same basic design: light enters an enclosed box through a converging lens and an image is recorded on a light-sensitive medium. A shutter mechanism controls the length of time that light can enter the camera.



Most photographic cameras have functions that allow a person to view the scene to be recorded, allow for a desired part of the scene to be in focus, and to control the exposure so that it is not too bright or too dim.
A display, often a liquid crystal display (LCD), permits the user to view scene to be recorded and settings such as ISO speed, exposure, and shutter speed.

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Hands-down, the greatest benefit of DSLRs is that of interchangeable lenses, and with that, the control they can bring to the look of the video you are shooting. And by control, I dont mean just in the dazzling variety of focal lengths from super wide angle, to long telephoto that are available to achieve different film looks.

I was referring to subject isolation. Look at any major film release and notice how in many scenes the subjects are visually isolated from their background. The subject is sharply in focus, while the background is blurred out. This isolation is achieved through selective depth of field with the use of faster wide aperture fixed focal length lenses, not zoom lenses.

A traditional HD camcorder may have a good zoom, but its widest f.stop or aperture (typically f/5.6) cannot compete with a fixed focal length lens- typically f/1.8 or better.

Digital Cinematography Cameras

Digital cinematography is the process of capturing (recording) motion pictures as digital video images rather than traditional analog film frames. Digital capture may occur on video tape, hard disks, flash memory, or other media which can record digital data through the use of a digital movie video camera or other digital video camera. As digital technology has improved in recent years, this practice has become dominant. Since the mid 2010s most of the movies across the world are captured as well as distributed digitally.[1][2][3]

Many vendors have brought products to market, including traditional film camera vendors like Arri and Panavision, as well as new vendors like RED, Blackmagic, Silicon Imaging, Vision Research and companies which have traditionally focused on consumer and broadcast video equipment, like Sony, GoPro, and Panasonic.




Studio Camera

professional video camera (often called a television camera even though the use has spread beyond television) is a high-end device for creating electronic moving images (as opposed to a movie camera, that earlier recorded the images onfilm).

Originally developed for use in television studios, they are now also used for music videos, direct-to-video movies, corporate and educational videos, marriage videos etc. Since the 2010s, most of the professional video cameras are digital professional video cameras.

With the advent of digital video capture in the 2000s, the distinction between professional video cameras and movie cameras disappeared as the intermittent mechanism became the same. Nowadays, mid-range cameras exclusively used for television and other works (except movies) are termed as professional video cameras.





Action Camera

action camera or action-cam is a digital camera designed for filming action while being immersed in it. Action cameras are therefore typically compact and rugged, and waterproof at surface. They typically record video as a priority over stills, as this allows continuous capture of the action without having to interact with the camera or indeed removing it from its housing, if an additional protective housing is used. Most record on a micro SD card, and have a Micro-USB connector.

Action cameras are associated with outdoor sports, and, often attached to helmets, surfboards or handlebars, are an integral part of manyextreme sports such as base jumping and wingsuit flying. Sometimes several cameras are used to capture specific perspectives, such as a helmet camera that sees the perspective of the actor in combination with a second camera attached to the environment of the rider, such as a board, wing, handlebar or wrist, that looks back onto the rider and records his reactions. Action-cams may therefore be referred to as helmet cams and by other similar names.

Digital Camera

digital camera or digicam is a camera that encodes digital images and videos digitally and stores them for later reproduction.[1] Most cameras sold today are digital,[2] and digital cameras are incorporated into many devices ranging from PDAs and mobile phones (calledcamera phones) to vehicles.

Digital and film cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device.[3] The diaphragm and shutter admit the correct amount of light to the imager, just as with film but the image pickup device is electronic rather than chemical. However, unlike film cameras, digital cameras can display images on a screen immediately after being recorded, and store and delete images from memory. Many digital cameras can also record moving videos with sound.