http://www.usa.canon.com/cusa/sna/consumer/eos_slr_camera_systems/lenses/extender_ef_1_4x_ii?pageKeyCode=writeReviewPage
Extender EF 1.4x II
7462
Specifications
Main Unit Spec
| Focal Length & Maximum Aperture | Magnification: 1.4x |
| Lens Construction | 5 elements in 4 groups |
| Max. Diameter x Length, Weight | 2.9" x 1.1", 7.8 oz. / 72.8 x 27.2mm, 220g |