Sigma 8mm which is used to make this picture, is a version for Canon camera. So I have used a Metabones Version 3 to fit to the Sony A7r. Incredible, the picture is very, but very beautiful. I also used the same lens with the Canon EOS 5D Mark III camera, but with the Sony A7r, the result is much better. We see what the 36MP sensor from Sony can do.