Image quality test results from the Canon EOS 5Ds R have been added to the Canon EF 400mm f/4 DO IS II USM Lens Review.
The 400 DO IS II review was completed before the 5Ds R existed. To get these results added to the site, Canon USA loaned us another copy this lens. Under the scrutiny of the ultra-high resolution 5Ds R, the center of the frame is showing a touch of softness in the center at f/4 in this copy of the lens, but this lens performs impressively otherwise.
Here are some comparisons to get you started:
Canon 400mm f/4 DO IS II compared to 400mm f/2.8L IS II Lens
Canon 400mm f/4 DO IS II compared to 300mm f/2.8L IS II Lens with 1.4x
Canon 400mm f/4 DO IS II compared to 400mm f/5.6L Lens
Canon 400mm f/4 DO IS II compared to 200-400mm f/4L IS II Lens
Canon 400mm f/4 DO IS II compared to 100-400mm f/4.5-5.6L IS II Lens
Canon 400mm f/4 DO IS II compared to 200mm f/2L IS Lens with 1.4x
The Canon EF 400mm f/4 DO IS II USM Lens is in stock at B&H | Amazon | Adorama.