How can I buy the lens for Swift? Where?

You can buy the lens directly on our website. And there are three options for you to choose. They are 2.1mm, 2.8mm and 3.6mm lens.

2.1mm http://shop.runcam.com/2-1mm-f2-0-1-3-fpv-camera-mtv-lens/

2.8mm http://shop.runcam.com/2-8mm-f2-0-1-3-fpv-camera-mtv-lens/

3.6mm http://shop.runcam.com/3-6mm-f2-0-1-3-fpv-camera-mtv-lens/

All of these lenses fit the Swift.