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Hidden cameras are often considered a surveillance tool. The term "hidden camera" is commonly used when subjects are unaware that they are being recorded, usually lacking their knowledge and consent; the term "spy camera" is generally used when the subject would object to being recorded if they were aware of the camera's presence.
Erich Salomon took images of European summit meetings and a session of the US Supreme Court in secret using an Ermanox camera hidden in his hat. Some classic early U.S. street photography – such as that of Paul Strand on the Lower East Side [2] – was obtained by fixing a second "dummy lens" to the camera, whereas the real shot was taken ...
Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.
More specifically, rangefinder cameras lack autofocus and employ a very different manual focusing method involving a rangefinder mechanism with an optical viewfinder. Furthermore, most digital rangefinder cameras (except Leica's recent models) lack live preview, which is sometimes considered a defining feature of mirrorless cameras.
During World War II, the Nazis took over a Berlin brothel, Salon Kitty, and used concealed microphones to spy on patrons. Also during the war, the British used covert listening devices to monitor captured German fighter pilots being held at Trent Park. In the late 1970s, a bug was discovered in a meeting room at the OPEC headquarters in Vienna.
This is a list of superzoom compact cameras, also known as travel zoom cameras. [ 1 ] [ 2 ] These are small fixed-lens " point-and-shoot " digital cameras that have a high optical zoom ratio. These cameras all include a power zoom lens that retracts into the body when not in use, along with an automatic lens cover or lens cap.
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