Sony Alpha E-Mount 50mm f/1.8 OSS Lens (Black) with NP-FW50 Battery + Filter + Lens Pouch + Kit Type: Fixed Length Lens Focal Length: 50 mm Camera Mount: Sony (E mount for NEX) Aperture: Maximum: f/1.8 Minimum: f/22 Compatibility: Sony Diameter: 49 mm Focus Type: Auto Focus Filter thread (Diameter): 49 mm