Review on Samyang 12mm F2.8 Ultra Wide Fisheye Lens for Nikon DSLR Cameras - Optimized for Full Frame Compatibility by Danny Nedumaran

I looked online and thought it would be a good choice for my Sony A7 which has 3 frames but actually less than 1/4 of that frame is directly in front of the lens in focus externally more than 1/4 around the circle are very blurry, totally unusable for me. All my Sony lenses are superior to this one. I was very disappointed. Looking for a full frame fisheye lens. This is not the one I sent back. I am a Google Street View photographer and cannot use this lens.