Sony SAL-16F28 16mm f/2.8 Fisheye Lens for Sony Alpha Digital SLR Camera 16mm (35mm equivalent) f2.8 fisheye lens provides unique photographic perspective Corner-to-corner sharpness Crisp focus from about 8 inches to infinity 4 built-in filters: Normal, 056, B12, A12 Quick filter selection with a simple rotating dial