1. 2X MAGNIFICATION: The 2X professional teleconverter is a premium teleconverter lens that enhances telephoto capabilities, allowing the focal length or magnification of the to be increased to 2x its original size.
2. PROFESSIONAL DESIGN: lens elements virtually eliminate chromatic aberration, while anti reflective coatings increase light efficiency, improve color consistency, and reduce .
3. WIDE APPLICATION: The lens is made of premium HD optical glass material with double sided multi layer coating. Favorable for photographing distant landscapes, wildlife, concerts, observing birds, etc.
4. APPLICABLE MOUNT: Uses a convenient T mount adapter for use between DSLR cameras and lenses such as 420?800mm 650?1300mm 500mm 800mm 900mm mirror type telephoto zoom lens.
5. MATERIAL: The lens shell is made of aluminum alloy aerospace grade material, CNC closely machined and anodized surface, lightweight and .

Specification:
Item Type: 2X Teleconverter
Product Material: Aluminum Alloy, Optical Glass
Application: for 420-800mm 650-1300mm 500mm 800mm 900mm T2 Mount Lens

packing list:
1 x 2X Teleconverter
1 x Lens Storage Pouch