Brazilian photographer Charles Oliveira (www.charlesoliveira.com.br) sent me some sample photos taken with the Mitakon Speedmaster 85mm f/1.2 lens for Nikon F-mount (US price: $799) using a D600 camera. He photographed his girlfriend Gaby Ramos in the city of Ouro Preto, a historic city in Brazil. The only thing he did to the images was to apply the VIVID MODE in the Nikon D600. Focusing the lens was not easy, but with enough practice one can make it work. Here are the pictures:
Charles also maintains a Portuguese Nikon Facebook page and Facebook group. Also check his 500px gallery.