The Sony HVL-F58AM is a high-powered flash unit designed for use with Sony Alpha DSLR cameras. It features a guide number of 58, making it ideal for low-light photography and indoor shooting. The flash head can be tilted and rotated for versatile lighting options, and it also includes a built-in diffuser and bounce card for even more control over the lighting. The HVL-F58AM is compatible with Sony's ADI flash metering system, which ensures accurate exposure in any lighting conditions. With its powerful output and advanced features, the Sony HVL-F58AM is an essential accessory for any serious photographer.