Upload & Sell: On
A 200-400 f4 zoom, with a built in 1.4 extender, is pure gold. I pre-ordered last year when the first "firm" rumors were floating around, and my local dealer is crazy enough to accept pre orders on rumors. That puts me at number one with my dealer, and he usually gets early deliveries of at least a few of what he orders. I can not wait, and my guess is I will finally have one by Christmas. Christmas of which year is still in question.
Actually, one of the things I really want the lens for is to shoot at air shows, which is exactly where this copy was spotted. I normally bring a gimbal head in, and shoot much of my shots from it, but I have a lever quick release on it to go to hand held mode very quickly. And fast changes from 200 mm to 560 mm is perfect on a full frame to accommodate the fast changing subject distances you find at an air show. I also use a drop in polarizer a lot, which can help a lot at an air show if there is enough light, and it is a breeze to adjust when you are on a gimbal head.
And of course the air show season will be over this year by the time this beautiful tool filters down to us "normal" users, but there is always next year. I guess I will need to shoot some wildlife and live birds in flight to check it out, until I can find some of those 50,000 pound mach 2.5 birds to really prove its worth.