Just got this lens from Amazon. It was bundled with a Sigma dock and MC-11 Cannon / Sony E adapter and a bunch of other crap that mostly got thrown away. It's a 4.25 lb beast. I'll be using it on both my a6300 and a7II. My main reason for getting this long of a lens is we are going on an Alaskan cruise this summer and I'm hoping to put it to good use. Time to practice with this new giant piece of glass. If you're wondering how big the front elelment is, it takes a 95mm filter.