The Rokinon 21mm f/1.4 ED AS UMC CS is a fast, wide-angle prime lens designed for APS-C mirrorless cameras, offering exceptional sharpness and performance for landscape, architecture, and astrophotography. With its large f/1.4 aperture, this lens excels in low-light conditions, allowing you to capture stunning, high-contrast images with vibrant color and impressive detail. The advanced optical design features Extra-Low Dispersion (ED) elements that minimize chromatic aberrations, ensuring clear, sharp images even at wide apertures. The Aspherical (AS) elements help reduce distortion, while the UMC (Ultra Multi-Coating) enhances light transmission, further reducing flare and ghosting. Its compact and lightweight construction makes it ideal for on-the-go photography, and its high-quality build ensures durability for outdoor and creative shoots. Whether you're capturing sweeping landscapes or starry skies, the Rokinon 21mm f/1.4 ED AS UMC CS delivers outstanding image quality and versatility for photographers seeking a reliable and high-performance wide-angle lens.