The 2x EX is placed between the lens and the camera, and it allows the photographer to use the 70-200mm f/2.8 lens as a 140-400mm f/5.6 telephoto zoom lens, and the 300mm f/2.8 lens as a 600mm f/5.6 ultra telephoto lens.; the high optical performance is maintained and the AF speed is not affected.
Lens construction: 6 elements in 5 groups
Focal length: 2x that of a master lens
Aperture coupling range: F2.8 - F32
Reproduction ratio: 2x that of a master lens
Dimensions: 68.5 X 52mm (2.7in. X 2.05in.)
Weight: 234g (8.3oz.)
|Box Contents:||Converter, Case|