Thank you! This was shot in Krasnoyarsk, Siberia.
I used canon 5d mark III and shot through 135mm lens wide open, f\2.8 to be exact.
I tried to ude it with canon 50mm 1.2 and due to VERY small back diameter of kowa, I experienced quite serious vignetting. So, my conclusion is: 100mm and larger focal lenth lens for full frame use only.