Overview

The 7Artisans 4mm F2.8 Fisheye is a circular fisheye lens offering a unique 220° field of view. Optically, it delivers sharp center performance but suffers from significant chromatic aberration and distortion, as noted by robinwong.blogspot.com. Build quality is solid with a metal construction, though the aperture ring can be stiff. It suits creative photographers seeking an ultra-wide perspective for experimental shots, but may frustrate those requiring critical image quality.