Editing Webcam (section)

=== Optics ===
[[File:Board Lens.jpg|left|thumb|[[S-mount (CCTV lens)|S-mount]] lens, designed to attach to the webcam's [[Printed circuit board|PCB]]]]
Various lenses are available, the most common in consumer-grade webcams being a plastic [[Lens (optics)|lens]] that can be manually moved in and out to focus the camera. [[Fixed-focus lens]]es, which have no provision for adjustment, are also available. As a camera system's [[depth of field]] is greater for small image formats and is greater for lenses with a large [[f-number]] (small aperture), the systems used in webcams have a sufficiently large depth of field that the use of a fixed-focus lens does not impact image sharpness to a great extent.

Most models use simple, focal-free optics (fixed focus, factory-set for the usual distance from the monitor to which it is fastened to the user) or manual focus.

Webcams can come with different presets and [[Field of view|fields of view]]. Individual users can make use of less than 90° horizontal FOV for home offices and live streaming. Webcams with as much as 360° horizontal FOV can be used for small- to medium-sized rooms (sometimes even large rooms). Depending on the users' purposes, webcams in the market can display the whole room or just the general vicinity.