7Artisan 50mm f1.8 is made of high quality optical glasses and metal body, featuring with 6 elements in 5 groups. Its bayonet mount is constructed from bass for ensured accuracy and durability. It is portable for your outdoor photography. keeping the background intentionally blurred to keep the attention of the observer on the main subject. With aluminum-made body and copper bayonet, 7artisans 50mm f/1.8 weights as light as 168g, which is portable for your photography. Spec: * Compatible Camera Mount : Sony E-Mount * Focus Type : Manual Only * Lens Type : Fixed-non-zoom * Maximum Aperture : f1.8 * Maximum Focal Length : 50mm * Minimum Aperture : F16 * Number of Diaphragm Blades : 12 * Number of Elements : 6 * Number of Groups : 5 * Full Frame Available : No * Zoom Type : Fixed * Dimension : 5x5x5cm * Weight : 168g