Product Description: The Sigma Mirror-Telephoto Multi-Coated 1:8 f=600mm lens is a powerful telephoto lens that provides photographers with an extended reach for capturing distant subjects. Its unique mirror design allows for a compact and lightweight form factor compared to traditional refractive telephoto lenses of similar focal lengths. This makes it suitable for wildlife photography, sports events, and astrophotography, where capturing subjects from a distance is essential. Key Features: Telephoto Reach: With a focal length of 600mm, this lens offers a significant magnification factor, allowing photographers to capture distant subjects with clarity and detail. Mirror Design: The lens utilizes a mirror-based optical design, which allows for a more compact and lightweight form factor compared to conventional refractive telephoto lenses. Multi-Coated Optics: The lens features multi-coated optics to reduce lens flare, ghosting, and chromatic aberrations, resulting in improved image contrast and color accuracy. Fixed Aperture: The lens has a fixed maximum aperture of f/8, which may require higher ISO settings or slower shutter speeds in low-light conditions. Manual Focus: Manual focusing is typically required with this lens, as autofocus functionality may not be available. Tripod Mount: Due to its long focal length and narrow field of view, using a sturdy tripod is recommended to stabilize the lens and prevent camera shake. Compact and Lightweight: Despite its long focal length, the mirror-based design of the lens contributes to its relatively compact and lightweight construction, enhancing portability and ease of use. Condition: Used Product Information: The Sigma Mirror-Telephoto Multi-Coated 1:8 f=600mm lens is a specialized optic that offers photographers an extended telephoto reach in a compact and lightweight package. Whether you're capturing wildlife in their natural habitat or celestial objects in the night sky, this lens provides the focal length needed to bring distant subjects closer and capture stunning images. What's Included: Sigma Mirror-Telephoto Multi-Coated 1:8 f=600mm Lens Lens Caps (Front and Rear) Protective bag Light filters x4