The Canon 200mm f/1.8 is an old lens, no longer manufactured, no longer supported (as far as I know). There is news that Canon is developing a 200mm f/2 lens.
Some incredibly lovely shots by the old lens can be found here (at least for now). The long focal length and wide aperture are essential ingredients of these photographs. (The photographer's skill, the subject and recording medium are other essential ingredients, to be sure.) Be sure to go beyond Page 1.
Until the annoucement of the new lens, the extinct version of the lens was trading reportedly for as much as $4000.
Noted for June 19, 2013
1 hour ago