Product Features When mounted between the camera and the lens, this adapter increases the focal length by 2.0 times Technical Details Brand Name: Nikon Model: B00006I5JZ Item Package Quantity: 1 Device Type: Teleconverter Item Display Diameter: 2.6 inches Specific Uses For Product: Camera Product Description 2.0x AF Teleconverter for use with Nikon AF lenses for Nikon SLR cameras