Sigma 15mm F1.4 DG DN Diagonal Fisheye Art Series for Sony E MountIn terms of optical performance, the Sigma 15mm F1. 4 DG DN Diagonal Fisheye Art has achieved excellent point image reproducibility and high resolution by correcting various aberrations, especially sagittal coma flare. The lens is capable of handling astrophotography, which demands particularly high quality performance, even when wide open. Unlike conventional fisheyes, the Sigma 15mm F1. 4 DG DN Diagonal Fisheye Art is exceptionally sharp across its