Digital zoom
Document cameras with digital zoom use a software algorithm to enlarge the picture. There is a noticeable difference between digital and optical zoom. Software zoom makes the picture more noisy, but when digitizing text documentation, various diagrams and drawings, the quality of the picture with digital zoom practically does not decrease. The main advantage of digital zoom is the affordable price. Additionally, these cameras are typically smaller, lighter, and more durable than models with optical analogue zooms.
Built-in microphone
A microphone is needed to record or broadcast video. Thanks to the microphone, the recorded footage receives audio accompaniment. Document cameras with a microphone are often used to digitize documents with verbal comments by the author. Such devices are indispensable in the preparation of educational lectures and seminars. The microphone is usually built into the document camera. But there are models with support for connecting an external microphone.
