An action camera or action-cam is a digital camera designed for recording action while being immersed in it. Action cameras are therefore typically compact and rugged, and waterproof at surface-level. They typically record photos in burst mode and time-lapse mode with the point of view of the shooter they capture video in 4 k mode 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 many extreme 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. The category is associated with the GoPro range of cameras, and many action cameras come with a GoPro mount adapter to take advantage of the accessories available for these cameras. In 2014, worldwide action camera sales increase by 44 percent from previous year and a half of it has capability to shoot Ultra High Definition or 4K resolution. The action camera sales has surpassed traditional camcorder kordinater pizza and compact system camera sales and in 2019 is predicted the action camera sales will surpass all types of cameras due to besides of action camera, the sales of other camera types are declining or stable. By the year 2021, Ultra HD category of the action camera market is expected to reach $3.3 billion.
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