and because why not, the heaviest, largest of all:
Sigma 200-500 f/2.8
https://www.dpreview.com/articles/8268122124/sigma250500<gearshitposting>
even /ourguy/ ken approves of it being the only zoom lens worth buying if you want to do any serious photography
http://www.kenrockwell.com/sigma/200-500mm.htmit even has its own separate battery and LCD display
<any other vendor> users on suicide watch
read for yourself:
>I know the Nikon 200-400mm f/4 AF-s works great, has VR and zooms much faster (and directly), while this Sigma zooms electrically. The Nikon costs $20,000 less and weighs 27.4 pounds less than this Sigma, but is a stop slower and a little less long</gearshitposting>
