SUPERIOR IMAGE QUALITY - Experience exceptional clarity and detail with 17 elements in 10 groups, ensuring professional-grade photos every time. This lens delivers stunning image quality. RAPID AUTOFOCUS SPEED - Capture fast-moving subjects with precision thanks to the advanced autofocus system, ideal for wildlife and sports photography. Achieve sharp focus quickly. EXCELLENT LOW-LIGHT PERFORMANCE - The f/4 maximum aperture allows for bright, clear images even in challenging lighting conditions, perfect for dawn or dusk shots. Superb low light capability. OPTIMIZED LENS WEIGHT - Weighing 3.25 lbs (1475g), this lens offers a balanced and manageable feel for extended shooting sessions without compromising stability. Comfortable and portable.