SIGMA 200-500mm f/2.8 in the field, JuzaPhoto revisits the SIGZilla

The SIGMA 200-500mm f/2. 8 EX DG was a very niche lens that SIGMA released in 2007. I had a chance to hold one back when Lensrentals. com had a copy of the behemoth. It's big and heavy, but who was it made for? I have been told that law enforcement and military were the main customers [.