Does the Logitech C920s Have A Privacy Shutter?

Yes. The Logitech C920s PRO HD Webcam records a physical privacy shutter: the recorded privacy shutter is yes, a physical shutter on the lens, and a physical privacy shutter appears in the recorded feature list. That is the whole of the answer, and the catalogue holds no ambiguity about it.

The useful part of the question is what a shutter does and does not tell you about the rest of the camera.

What the record settles

• Privacy shutter: yes, a physical shutter on the lens.
• Resolution: 1080p at 30 fps, 720p at 30 fps.
• Field of view angle: 78 degrees diagonal.
• Focus: autofocus with a glass lens.
• Built-in microphone: yes, stereo, with a range up to 1 m.
• Mounting: a universal mounting clip that fits laptops and monitors. A tripod is not included.
• Cable: 1.5 m, attached USB-A. USB connection: USB-A.
• Dimensions: 43.3 by 94 by 71 mm including the mounting clip. Weight: 162 g, 5.71 oz.
• Operating systems: Windows 8 or later, macOS 10.10 or later, ChromeOS.

The recorded intended user wants a fixed 1080p camera for calls and streaming, with a shutter they can close without unplugging it. The shutter is a mechanical barrier over the lens rather than a setting in software, and that is the reason the camera is worth a page of its own.

What the other two cameras record

The Logitech Brio 4K records up to 4K at 30 fps, 1080p at 60 fps, autofocus, an adjustable field of view with 90, 78 or 65 degrees as three presets, infrared support as yes, and a built-in microphone of dual omni-directional type with a range up to 1.2 m. No privacy shutter is recorded for it.

The Elgato Facecam records 1080p at 60 fps, a fixed focus prime lens, a field of view adjustable in software, 82 degrees diagonal, a monitor mount and a tripod thread, and a built-in microphone of no. Its manufacturer states that the camera has been discontinued, and its recorded product status is discontinued by the manufacturer. No privacy shutter is recorded for it either.

An absent record is not a finding. The catalogue holds no privacy shutter specification for either of those cameras, which means the question has to be put to the manufacturer for them rather than answered from here.

What the record does not settle

There is no recorded statement about how the shutter is operated, whether it can be closed while the camera is in use, or whether the microphone is muted when it is closed. There is no recorded indicator light, no recorded indicator behaviour, and no recorded software requirement for the camera at all. The catalogue records what the hardware is, not what a person experiences on a call.

If the question behind the question is whether the camera can be trusted in a shared room, the recorded shutter is the strongest part of the answer, and everything else about image and sound quality is not covered by the record.