Image quality results from the EOS 5Ds R have been added to the Canon EF 70-200mm f/4L IS USM Lens Review.
This small, light lens is a great performer and is definitely 5Ds-ready. Take out the easy-to-correct CA for really impressive performance.
B&H has the Canon EF 70-200mm f/4L IS USM Lens in stock with a $50.00 instant rebate (note that B&H checkout is not available until Tues 9/29 2:00 PM EDT).