Canon FD 85mm f1.2 L lens. The lower section has been dismantled(ive successfully undertaken around 5 to 8 conversions of this FD 85mm f1.2 L lens with Edmika's kits ). (and the latest Simmod mount isnt being sold to the public. so it has remained in a air tight snap lock container wirth lots of silica sachets. ).
eBay