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Fixed focus lenses have a predetermined focus range and cannot be adjusted. Autofocus is precise and convenient, but it’s the most expensive of the three.Manual focus is less convenient but still allows for precise focusing and is typically less expensive.However, it lacks some key features like digital zoom, face tracking and motion detection.
Along with being exceptionally easy to use and having unbeatable video quality, it also offers the most features and has a high-quality, smart design.
The only way to get high resolution when you zoom in is with optical zoom, a feature really only found in higher-end digital cameras.
Noise reduction cancels ambient noise by focusing on the frequencies of human voices and turning others down.
When you do this, you reduce the number of pixels in your resolution rectangle, which results in poorer image quality.
It can be useful at times, however, especially if your webcam shoots in 1080p and can sustain a slight reduction in resolution.