Overview

The Sigma 15mm F1.4 DG DN Art is the world's first full-frame diagonal fisheye with f/1.4, offering a unique 180° field of view. It delivers excellent sharpness across the frame, even wide open, with minimal coma and chromatic aberration, making it ideal for astrophotography. Build quality is robust with dust/moisture sealing, a manual focus lock, and a rear filter holder. Weaknesses include large size, heavy weight (1,360g), and high price ($2,000). It suits astrophotographers, concert shooters, and those needing a high-performance fisheye in low light.