Event attendee dressed in 1957 photojournalist garb / equipment. Processed accordingly. The Vignetting is natural at f/1.0
The lens is the Leica M version sitting on a Techart PRO Leica M – Nikon Z Autofocus Adapter ver II (TZM-02). AF works well on a Z8/Z9. VR isn't great so I leave it turned off, but at f/1 how often would it be needed?
