| This tele extender can be used with fixed focal
length lenses 135mm and longer (except the 135mm f/2.8 Softfocus lens),
and the EF 70-200 f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, and 100-400
f/4.5-5.6L IS zoom lenses. Superb optically, it preserves the image
quality of the lens it's mounted to and multiplies its focal length
1.4x. Effective aperture is reduced by one f-stop; autofocus is
possible on any EOS camera when combined with a lens having an f/4 or
faster maximum aperture. The new version II maintains the outstanding
optics of the previous version, and adds enhanced weather-resistant
construction, and improved anti-reflective surfaces in the barrel. |
