This particular lens is equipped with auto focus to help you take that perfect picture. The lens has a maximum ƒ/2 aperture and a minimum ƒ/16.
From Amazon
TTArtisan 25mm F2 Wide-Angle APS-C Camera Lens Large Aperture Manual Fixed Camera Lens for Sony E Mount Cameras NEX-5 NEX-C3 NEX-5N NEX-7 NEX-F3 NEX-5R NEX-3N NEX-5T A3000 A5000 A6000