Okay… I’ve recieved some quesstions about this shot. I took this at an airshow earlier in the year. The announcer warned the crowed that the plane was going to do a high speed pass approaching the sound barrier to create the cone effect (which appears just before breaking the speed of sound). Yes… it was very difficult to focus and pan to get this shot. Luckily, I managed to keep it in the frame. My equipment: Canon EOS 5D with 100-400L zoom. Thanks for your comments.