A few days before we went to Yverdon I bought an affordable Nikon F5. I have some Nikon lenses and also from Tokina and Vivitar. Some are AF and some MF. At that day I tested the Tokina AF 20-35mm, Vivitar 90mm f2.8 Macro (MF) and a Nikon Nikkor 50mm f1.2 (MF). I did some shots with 1.2 but as you can see to get the right focus is nearly impossible. So most of the portraits with the 50mm I did with 4.5-5.6. That worked fine. The film was a fresh Kodak Gold 200.