INCLUDED - Sigma 300-600mm f/4 DG OS Sports Lens, Filter Kit, Pen Lens Cleaner, Software Kit, and Cleaning Kit for comprehensive photographic needs. SUPERIOR IMAGE QUALITY - Features 28 elements in 21 groups, including 6 FLD and 1 SLD, ensuring exceptional clarity and reduced aberrations across the entire zoom range. VERSATILE FOCAL LENGTH - A 300-600mm zoom range provides extensive telephoto capabilities, ideal for sports, wildlife, and distant subjects with precision. EXCELLENT LOW-LIGHT PERFORMANCE - A constant maximum aperture of f/4 delivers bright images and beautiful bokeh, even in challenging lighting conditions.