The second test I made was with the A7r and the Nikon 135 f3.5 lens. Probably at this resolution you won't be able to tell the difference between yesterdays image and this one but looking at them side by side at a higher resolution, the A7r image contains more detail. Depending on your media choice, i.e. what you do with your images, depends on whether the A7r is really necessary. Certainly you would benefit from the higher resolution of the A7r if large prints are to be made but for web use, no need to purchase the A7r.