This page provides information on the V-Ray Dome Camera attributes.
Choosing the Dome Camera option turns the camera into a VRayDomeCamera, making available options to flip the camera.
||Create menu|| > Cameras > V-Ray > V-Ray Dome Camera
||V-Ray menu|| > Create > Cameras > V-Ray Dome Camera
Flip X – Flips the view around the X axis.
Flip Y – Flips the view around the Y axis.
Fov – Specifies the field of view for the VRayDomeCamera.