It's the stock lens at 18mm. I'm planning to get a 10mm soon.
There's quite a bit of smoothcam working there, which zooms in on the frame a lot, plus I still have some vibration in the heli to tune out. It was a really windy day at the corn field so it was tough to get stable footage. I'm working on it though. Testing some modifications tomorrow and hopefully it will be glass-smooth.