Canon has officially launched its recommended lenses list for use with the ultra-high resolution EOS 5Ds and 5Ds R DSLR cameras.The following lenses are recommended by Canon for getting the best from the EOS 5DS and EOS 5DS R:Admittedly, there are a couple of things about the official list that leave us baffled. For one, why is the EF 70-200mm f/4L USM listed but not the newer EF 70-200mm f/4L IS USM ? The IS version of the lens is newer and produces just as good (if not slightly better) image quality.For another, I can't understand why Canon would include the EF 50mm f/1.8 II (and to a lesser degree, the EF 50mm f/1.4 USM) in the recommended lenses list. I personally would not consider their wide-open image quality to be optimal for such a demanding sensor. [Sean]I changed "EF 200mm f/2L II USM" to "EF 200mm f/2L IS USM" because, of course, there is no such lens (I did not notice the discrepancy when posting but linked to the correct lens). It is our belief that it's a simple typo – the second "I" should have been an "S." Below is a screenshot of the source document that also contained the error.