Camera manufacturers had to take into account that people wanted to have similar equipment to the type seen in spy movies and on television.
There are various reasons to hide a small camera to spy on someone, and some of the reasons are not always wholesome. Many people use such cameras to spy on their neighbor while they get dressed, and several cases of people secretly filming others having sex have caused several problems. This is not to say that hidden spy cams are always used for immoral purposes, since they have been used to great effect by the police, FBI, and other law enforcement agencies.
Some cameras that are so small as to be practically undetectable are currently in use all over the world. Some of the surveillance devices commonly seen in popular spy movies are real.
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