The NiSi 15mm f/4 Sunstar is a super wide-angle prime lens for Nikon Z mount, specifically designed to create beautiful 10-pointed star effects from light sources. Its optical construction includes aspherical and low-dispersion elements to ensure edge-to-edge sharpness and minimal distortion. With a 72mm filter thread and a compact all-metal design, it is an excellent choice for landscape, architectural, and astrophotography enthusiasts.