the AF 40mm f/2 Lens from TTArtisan is a versatile prime designed for Sony E-mount mirrorless cameras. With its fast f/2 maximum aperture, this lens performs well in low light and separates subjects from their backgrounds effectively while creating flattering bokeh around them. The AF 40mm f/2 features durable all-metal construction and has a USB port on its lens cap for making convenient firmware upgrades. Its small and lightweight form factor renders this lens as an optimal choice for street, travel, and documentary photography.