Went to the zoo today w/ my family. So photography wasn't the main focus. However, I wanted to try out my Sigma 150-500.
It's too long to fit in any bag, but it comes with a nice strap that I used to carry it around with. It was a bit heavy after 5 hrs, but nothing terrible.
OS needs a second to lock down. So I ended up starting the OS w/ the AF on button a bit earlier than I was ready to pull the trigger. But it works very, very well. Can I say that again? I shot 150 at 1/5 and it nailed it. It allowed me to shoot f/8 when normally on my 100-400 I would have shot wide open. I am happy w/ it wide open, but it's a bit better stopped down a notch.
AF is good. It isn't wicked fast, but does a good job. Hunts less than my old bigma. I had it go in and out twice, but that was two extreme situations.
The bokeh doesn't have the cross hatched look some longer lenses exhibit.
I am going to go back this week by myself and have some fun.
Two thumbs up. I am very happy. Even if this lens was at the same price point as the 100-400 I would get it.