Optical lens set optics designed to deliver clear and sharp images with minimal distortion. Convenient to use with straightforward handling and quick setup in various environments. Flexible configuration with multiple lenses to expand focal length options for different imaging tasks. Compatibility: intended for use with compatible optical systems. Exact compatibility depends on the model; review the product specifications for details. Size and materials: dimensions, weight, and construction materials vary by model. Check the product page for exact figures and build details. Performance and durability: designed to provide reliable imaging performance under typical usage conditions. Use scenarios 1) Photography and videography requiring different focal lengths for storytelling and composition. 2) Educational demonstrations of optics in classrooms or science labs. 3) DIY optics projects or experiments that involve interchangeable lenses and focal length testing. Care and maintenance: keep lenses clean with a soft cloth; store in a protective case and avoid touching the lens surfaces.