The NIKKOR Z 600mm f/4 TC VR S, from Nikon, is a super-telephoto prime built for the rigors of sports and wildlife photography. Built-in 1.4x teleconverter allows you to instantly extend your reach to 840mm simply by flipping the right-hand switch. The integrated design also reduces the likelihood of attracting dust or dirt to optical or sensor services and saves time when changing between focal lengths. Fast f/4 maximum aperture excels in available lighting conditions and also benefits from controlling the depth of field to separate and isolate subjects from a busy background. The SR element features a specialized high-dispersion design that refracts wavelengths shorter than blue; this helps achieve truly accurate color rendering and also aids in making the lens design more compact. The newly developed Meso Amorphous Coat offers the greatest anti-reflective performance from a NIKKOR lens, outperforms the Nano Crystal Coat in regard to diagonal incident light, and matches the performance of the ARNEO Coat for vertical incident light. A guide bar is also employed, which helps reduce focusing vibrations for greater continuous focusing speeds. (WARNING: Do not use this product if you have a pacemaker or other medical device. The magnet or magnets in this product could cause medical devices to malfunction.)Benefitting video use, the Silky Swift VCM is also especially quiet and the multi-focusing system also greatly reduces focus breathing for greater compositional accuracy when racking focus. Vibration Reduction Image stabilization reduces the appearance of camera shake by approximately 5 stops to better enable handheld shooting in low-light situations. The tripod mount also rotates for easier switching between vertical and horizontal shooting orientations. The intuitive "no-look" control layout puts all of the frequently-used buttons and dials in easy-to-reach locations to prevent the need to move your eye from the viewfinder.