This is a fun lens that takes photos like a toy camera. The following is a quote from the manufacturer's description: This is a compact lens for Sony E-mount cameras with a 35mm equivalent focal length of 55mm and an open aperture of F1.7. It has a unique design that makes the center of the image sharp and the periphery gently blurred. It also allows for manual focus and manual aperture control, and is well-suited for mirrorless cameras, with a lightweight and smart form factor.