The previously rumored NiSi 15mm f/4 wide-angle manual focus full-frame mirrorless lens for Nikon Z-mount is now officially announced and available for pre-order (The Nikon Z version is not listed yet, check also Amazon, and B&H): Specifications: Lens design: MTF charts: Additional pictures: NiSi 15mm f/4 lens by NikonRumors No related posts.