【Note: Manual Focus/MF】Please note: This is a manual focus lens (no autofocus/no AF)". MUST need to "Set to camera mode to M (Manual)" for use, otherwise it will show the "Lens not attached" error (it will not allow you to press to shutter when in error page". More important, manual lens MUST need to manual turn the "focus ring" on the lens to achieve focus.
【Super Telephoto Lens】Manual focus telephoto lens, a focal length of 420-800mm and an aperture of F/8.3-16 (non-adjustable aperture value, f8.3 at 420mm and f16 at 800mm), filter size of 62mm, full frame, F mount, built with high-quality materials and robust construction, making them durable and long-lasting;
【Upgraded version】Upgraded into an F mount, which can be mounted on Nikon DSLR cameras without connecting the T adapter ring. For those who photograph wildlife or the moon as a hobby, this lens would be a great choice;
【NO electronic contacts and No Autofocus Motor】Manual lenses lack electronic contacts, so you need to use our lens in Mode M. In the meantime, you must set the ISO/Shutter speed in mode M, otherwise the photo will come out too Bright/Black. On manual lenses, the camera may display F-- because it doesn't have direct access to the aperture value.