A team of astronomers using a telescope comprised of two Canon EF 200mm f/1.8L lenses has discovered a Jupiter-sized planet located 600 light years from Earth. The telephoto twins are the front end of a system that can measure dips in light output from a distant star, which suggests the presence of a passing planet.
More information on the discovery is in a HubbleSite press release. Canon discontinued the EF 200mm f/1.8L lens in 2003.
Thanks to "Brian" for bringing this to our attention.