Nikon Nikkor S Auto 55mm f1.2 PRE-AI Manual Focus Objektiv neuwertig - getestet siehe Bilder
It's a very fast lens wide open. It's also noticeably better at f/1.4 than the Nikkor 50mm f/1.4 lens. This one is the cult classic 55mm f/1.2 S Auto lens. It was Nikon's fastest lens, and I think the AIS version is still in production.