I am selling this lens after purchasing it used and using it twice. I mainly used it with the GH series. No box. High-performance 12mm F1.8 prime lens, perfect for wide-angle photography. This is a Kowa Prominar lens that offers a dynamic angle of view and minimizes peripheral distortion and contrast falloff. It is a lens with sufficient optical performance to support high-resolution 4K cameras. The 12mm model with a wide angle of view and an aperture of F1.8 has a distortion value of 0.59%, achieving natural perspective rendering. The minimum focusing distance is 0.2m, allowing for wide-angle close-up shots, making it easy to handle and suitable for a wide range of situations. - Model Name: Kowa PROMINAR 12mm F/1.8 - Included Accessories: Lens hood, lens cap, instruction manual, case - Focal Length: 12mm - Aperture: F1.8 - F16