My wife and I decided to spend two days at the Kansas City Zoo during a week I took off from work. That gave me time to really exercise my Sigma 150-600mm lens and... decide it wasn't worth the hassle.
Day 1 was using the lens handheld mostly and... failing much of the time even when pulled back. Day 2 was using a pretty decent setup short of using a tripod mount and... getting better results overall, but still not not the greatest.
Even with a decent setup to hold the thing as still as possible without using a tripod, getting sharp shots from it was rather difficult where I really wanted to... reach out.
Now I have the Nikon 200-500mm f/5.6 and I'm having much, much better luck with it so far.
