This monster lens was introduced in 1993, six years after the launch of EOS-series cameras, and discontinued in 2005. The initial price set for this lens was US$89,579. According to Wikipedia,
there are about a dozen of these lenses in existence. Sports Illustrated magazine owns two of them, as does Canon Professional Services and James Jannard, the billionaire founder of Oakley.
The one shown here was on display at the Canon Pro Shutterbug event held at Cineleisure in Singapore, Sept. 23-24, 2006.

Mounted on the lens was nothing less than a Canon EOS 1Ds Mark II. The pretty models are Ying and Niko. More photos from the event are here.

You can order prints/T-shirts made from the most popular photos in this gallery from Exposure Manager.

See the lead photo featured in The World's Most Extreme Photography Equipment on the Crestock Blog.