V-Ray render tab > Camera rollout > "Cylindrical (point)" camera type should allow setting independent horizontal FOV (0-360) and vertical FOV (0-180)
As per this forum post by Vasil Minkov (Chaos dev) from 2016: The FOV value of the cylindrical (point) camera currently sets both horizontal and vertical field of view to the same value. We should change this behaviour and enable to select indepen...
