Sony 35mm f/1.8 OSS E-Mount Prime LensSony's 35mm f 1. 8 OSS Alpha E mount Prime Lens is a powerful prime lens for Sony 35mm cameras. It is a compact, fixed focal length lens and offers a 35mm equivalent of 52. 5mm. The quick, constant f 1. 8 aperture makes this lens ideal capturing fast moving subjects with little blur or even for retaining crisp, sharp imaging in low light conditions. A quiet linear motor controls focus while an in lens stepping motor controls aperture. The two work in