ProDoes what it says on the tin
ConsA bit pricey and doesn't work with some lenses
Overview ---------------- I bought this extender to go with my Canon EF 70-200 f4.0L IS lens. It extends the range to 280mm and increases the maximum aperture to 5.6. This means that autofocus on a 20D, 30D, 40D or 5D body will still function properly at any focal length. Construction...
> Read review