In Blender 2.79 this option was in the Camera tab. In 2.8 I see I can adjust the 3D viewport focal length. However when I go into camera view, I can't seem to find a place to adjust the camera focal length. Is this done differently in 2.8?
I just realized that I can change the focal length first in Eevee then switch back to cycles. Not sure if there's an option to do this when in Cycles.