- May 29, 2019
You are missing the point that with the optical design of these lenses, it would be easy to make them telescope together and be very compact (and light) for transport. Let's wait and see before drawing conclusions.The problem is that they have chosen to use very few elements in these new lenses, 9 elements in 6 groups, cf the ancient 400/5.6 which is 7 elements in 6 groups and 10.4" long. That keeps the cost down. To make it shorter, they would have to put in more groups. The 500PF is 19 elements in 11 groups, for example.