1The lens itself is a T2 mount, which can be installed on the telescope to observe the moon, etc. Through the standard adapter ring, it can be installed on the for Nikon camera for shooting distant objects. 2Fuselage is made of high quality aluminum material, which has delicate texture. 3Manual focusing adjustment, optical glass multilayer MC coating. 4It has a 420800mm/16.531.5inch ultralong zoom, and with a 2X teleconverter, the focal length range becomes 8401600mm/33.163inch. 5Telephoto lenses are good for shooting distant scenery, wildlife, concerts, bird observation, etc. 6Its ultra powerful 2X Teleconverter, which can double the focal length or magnification. Condition: 100% Brand New Weight: Approx.1058g/37.3oz Options:Black,White 420-800mm Lens Parameters: Item Type: Telephoto Lens Material: Plastic + Aluminum Alloy + Optical Glass Focus Mode: Full Manual Focus Focal Length: 420-800mm/16.531.5inch Aperture: F/8.3-16 Front Filter Diameter: 67mm/2.6inch Anti-shake Function: None Applicable Models: for Nikon F Mount Camera (need to Install the Standard Adapter Ring to Use) 2X Teleconverter Parameters: Material: Plastic + Aluminum Alloy + Optical Glass Coating: MC Coating Interface: T2 Mount Magnification: 2X 1 x Lens 1 xFront Lens Cover (Installed) 1 x Rear Lens Cover (Installed) 2 x Storage Bag 1 x Adapter Ring 1 xWrench 1 x2X Teleconverter (Lens Cover Installed)