The NiSi 15mm f/4 ASPH ultra-wide-angle lens combines all of NiSi's expertise in optics. It is a lens that focuses on top-notch features and concentrates on the essentials - the quality of the materials used and the excellence of the glass.

The full metal body and precision-crafted optical glass ensure excellent sharpness across the entire image field. The construction consists of 12 elements in 10 groups, including a double-sided aspherical element and two elements with very low dispersion. These features distinguish the NiSi 15mm f/4 ASPH.

The lens diaphragm is constructed with 10 straight blades, allowing for starbursts from F4 to F22 while maintaining optimal image quality throughout. This dispels the myth that a small aperture is needed to create a starburst effect. Additionally, there is a mechanical aperture ring with manual and stepless adjustment, making it perfect for precise tuning and use in videography.