Micro Four Thirds System, 7mm (35mm Equivalent), Aperture Range: f/2.8 to f/16, Multi-Layer Coating to Reduce Flare, Multi-Layer Coating for Enhanced Color, Manual Focus and Aperture Rings, Minimum Focusing Distance: 3.5mm The 3.5mm f/2.8 Ultra Wide-Angle Circular Fisheye Lens ...Micro Four Thirds System, 7mm (35mm Equivalent), Aperture Range: f/2.8 to f/16, Multi-Layer Coating to Reduce Flare, Multi-Layer Coating for Enhanced Color, Manual Focus and Aperture Rings, Minimum Focusing Distance: 3.5mm The 3.5mm f/2.8 Ultra Wide-Angle Circular Fisheye Lens from Meike is designed for Micro Four Thirds Cameras. This manually focused lens has an aperture range of f/2.8 to 16 and provides a 220? angle of view creating a circular image. A multi-layer coating enhances color reduces glare prevents ghosting and ensures a sharp image.