What is it, something like 2.6kg, no thanks. 150-600 is plenty of range and under 2kg. Too bad it isn’t coming in RF mount, I’ll never buy Canon’s 100-500L, ludicrously priced at nearly $5K in Australia and stupid restriction on the TC. I owned the EF 150-600 and had an excellent copy, even quite sharp at 600mm wide open and it worked really well on my 1DX. I already own the Sony 200-600 so this won’t be of much interest to me, but good to see more options coming.