TTartisan 500mm F6.3 Telephoto lens for Nikon Z-mount Capture distant worlds, Deep-Sky Astrophotography Two ED (extra-low dispersion) glass, good coma control and the F6.3 aperture help you capture stunning deep-sky objects in the night sky. &ldquo Get closer' to the world The telephoto lens is ideal for photographing distant subjects that you cannot get closer to. Such as airplanes, sports and wildlife, etc. For Humanist Photography This 500mm f6.3 lens is a good choice for humanist photography, which allows you to maintain a large and comfortable distance from the subject. Simplify Composition The telephoto lens is great for creating strong and simple images without distractions. Whether you are a telephoto photography enthusiast or a beginner, you can enjoy the fun of telephoto photography. Large ED glass Reduce chromatic aberration and contribute to decent image quality. Comes with tripod mount ring TTArtisan 500mm F6.3 comes with a tripod mount ring to keep the camera and lens balanced on the tripod. Note: Vignetting Test The E-mount has slight vignetting on full-frame cameras. (Slight vignetting at F6.3, no vignetting at F22). There is no vignetting for Z, RF, L-mount.