Yes, the field of view can be adjusted on a smartphone camera by changing the focal length of the lens. This can be done by zooming in or out, depending on the capabilities of the camera. Some smartphones have dual or triple camera setups which allow for different focal lengths, while others rely on digital zoom to achieve a similar effect. Additionally, third-party camera apps may offer more advanced options for adjusting the field of view, such as manual controls for aperture and focal length.