The EF55-200mm refers to two telephoto zoom lenses produced by Canon. They are of the EF lens mount that is compatible with the EOS line of cameras.
The two versions are: 4.5-5.6 4.5-5.6 II
Lenses Attribute 4.5-5.64.5-5.6 II Image stabilizercolspan=2 Ring USMcolspan=2 L-seriescolspan=2 Diffractive Opticscolspan=2 Ultra-low dispersion glass elementcolspan=2 Synthetic Fluorite glass elementcolspan=2 Macrocolspan=2 Short back focuscolspan=2 Maximum aperture 4.5-5.6 Minimum aperture 22-27 22-27 (1/3-stop increments is 22-29) Weight Max. Diameter x Length x Filter diameter 52 mm Groups/elements 13/13 # of diaphragm blades 6 Closest focusing distance Currently in production?colspan=2 Release date March 1998 September 2003
References EF55-200mm f/4.5-5.6 USM at the Canon Camera Museum EF55-200mm f/4.5-5.6 II USM at the Canon Camera Museum