Built-in fisheye lens, Light spread reaches the perfect angle 180°，which makes a ultimate effect for light spread.

1）lens magnification：0.23X
2）Light source image surface diameter：0.25
3）Light aperture diameter：φ2.0
4）Emitting radiation angle：180°
5）Lens composition: 3 sets 4 pcs
6）focal distance: unlimited
7）TTL optical length：44.8
8）Lens aperture diameter：φ39