—Information accurate as of: 763959 Update
The Camera is a Tool item in Rust, it is semi-rare and used to take screenshots in a "fancy" way.
The controls for it are fairly simple, hold down secondary fire and move your mouse back and forward to zoom, and primary fire to capture the screenshot. You can also lock the focus with third fire.
Trivia
- The camera has been used multiple times by the Facepunch devteam to take screenshots in-game.