• Super Telephoto Zoom Lens: The lens features manual focusing in F/8.3-16 aperture at 420-800mm focal length, to separately control the super focal zoom from the cameras
• T-Mount Lens to AI-mount: T mount lens with adapter ring, the replacement for T/T2 lenses for Nikon AI-mount D50 D90 D5100 D7000 D3 D5100 D3100 D3000 D60 cameras
• Functional Structure: The lens consists of 4 elements in 2 groups, with the lock to fix the lens for the precise shoot. The whole metal structured body provides tough and durable constructions
• Ultra Multi-Coating: Adopts multi-coated technology to reduce flare and ghost to get vivid color and clear images. Premium optical glass lens provides high light transmittance
• Universal 1/4 Mounting: The base with 1/4 screw thread down the lens makes wide application on tripod and monopod, the base with the ring can rotate, convenient to install in seconds

Specifications:

• Material: Metal
• Mount: T2 mount
• Adapter Ring Mount: T2-AI
• Replacement for: Nikon AI-mount D50 D90 D5100 D7000 D3 D5100 D3100 D3000 D60 cameras
• Focal Length: 420-800mm zoom lens
• Aperture: f/8.3@420mm-f/16@800mm
• Optical Constructions: 4 elements in 2 groups
• Zoom System: Linear push-pull
• Exposure: Automatic exposure is available in Aperture Priority mode only for cameras with TTL metering systems; Other cameras must be set in full manual
• Focusing: Manual helical(rotary) operation(Not AF compatible)
• Minimum Focusing Distance: 1.6 meters(5.25ft) from front lens element
• Filter Size: 62mm
• Diameter: 69mm
• Length: 24-35cm / 9.45-13.38in(with caps)
• Lens Dimension: 24 * 7 * 7cm / 9.45 * 2.76 * 2.76in
• Adapter Ring Dimension: 6 * 6 * 1.3cm / 2.36 * 2.36 * 0.51in
• Weight: 659g / 18.3oz