Opteka 2X TeleConverter for the Opteka 500mm/800mm/650-1300mm Lenses

The Opteka 2x High Definition Tele-Converter is for use with T-Mount manual focus lenses. It will multiply the focal length of your existing lens by 2x, and will cut back the amount of light by two f/stops.

For example, using a 2x tele-converter with a 500mm lens will effectively increase the focal length to 1000mm. A lens set to f/2.8 will now be f/5.6.
 

Focus Modes	Manual Focus
Diameter	1.65 inches (42mm)
Length	2 inches (50mm)
Weight	2.8 oz. (80g)

Included - Opteka High Definition 650-1300mm Super Telephoto Zoom Lens, Opteka High Definition 2x Multiplier, T-Mount Adapter, Lens Hood, Padded Pouch with Shoulder Strap, Front and Rear Lens Caps.