I just got the Bigmos (Sigma 150-500mm) and even though I knew it was gonna draw attention, I have still been a bit suprised. First, it has been bitterly cold out, so I figured if I saw any people, they wouldn't want to chat. Second, its winter, there are not that many people out... but still I have heard things when people walk by. Its strange but I'll get used to it.
I was at Wendy Park in Cleveland, on the Lake Erie shore, using gulls as practice (learning) how to shoot birds in flight with a monopod. A couple got out of a car not far from me and after a minute walked up and said ...
"Wow that's a big lens, my brother just passed and is buried in the Lake, mind if I look for a second?"
So I turned on live view and pointed the lens out to the water. I was completely confused. After a minute of talking, turns out he had died the day before, and his ashes were going to be spread on the lake in the spring/summer. I felt for her, but the lake was only 10 feet in front of us... it did not take a 500mm lens to see it. I was polite, it was nice to meet them, and they left. I am hoping that is as strange as it gets for me, but I have a feeling it won't be.