Nikon has the 14-24mm f/2.8, the 17-35mm f/2.8, the 24-70mm f/2.8, the 28-70mm f/2.8, the old 35-70mm f/2.8, the 70-200mm f/2.8, and the 80-200mm f/2.8. All of which will work on your F5. So, there are a bunch of options out there for you. If you also have bodies that need aperture rings, then your selection drops to the 17-35, either the 28-70 or the 35-70, and the 80-200.
As stated above it depends on the range you are looking to cover. For wide angle: 14-24mm, 16-35mm, or the 17-35mm Mid range: 24-70mm, 28-70mm, or the 35-70mm Telephoto: one of the 80-200mm's or 70-200mm's Good Luck and Enjoy your Nikons!