1.68mm f/1.8 125d HFOV GP16818CS (No Distortion) L5W4H2 After removing the stock lens

After removing the stock lens the 3

(2) Stainless Steel Bolts and Wingnuts

You'll be glad to know that's exactly where we mounted this lens the most as we were tweaking its production

No (Not Needed)

Example Video Using Ninja200 VR Rig:

1.68mm f/1.8 125d HFOV GP16818CS (No Distortion) L5W4H2 After removing the stock lensThis is a SUPER wide angle CS mount lens that has some internal optics that create no barrel distortion for the resulting image (flat horizons,no fisheye). These optics invert the image vertically so make sure to flip the capture image in the GoPro Camera Settings. Specifications: Model Number GP16818CS Manufacturer Part Number SY110M Focal Length 1. 68mm Fish eye Distortion NO (Barrel Distortion Corrected Inside Lens) Black Vignetting NO Weight