Lens construction is 11 elements in 9 groups, aperture range of f2.8 - f16 APS-C View of Angle: Diagonal: 190° Horizontal: 161.8° Vertical:106.5°, minimum focusing distance is 0.15m Lens Not Attached : MANUAL LENS need you to enable "M mode " or "Release without lens" in the setting of camera The large f2.8 aperture allows more light to enter and gives you more creativity! Compatible with Sony E Mount Mirrorless Cameras A6400 A5000 A5100 A6000 A6100 A6300 A6500 A6600 Meike 7.5mm f2.8 Ultra Wide Angle Manual Focus Fisheye Lens for Sony E Mount Mirrorless Cameras A6400 A5000 A5100 A6000 A6100 A6300 A6500 A6600