one of the best lenses and sharpest I have owned.
glass is in excellent shape and had has a front B+W UV filter forever.
small crack in top lens distance window( still readable and still weather sealed.)view in pics
I have owned this lens for 3 years. and it has always been a work horse.
I find I tend to use it all the time.
EF Mount L-Series Lens
Aperture Range: f/2.8-32
Fluorite & Ultra-Low Dispersion Elements
Two Mode Optical Image Stabilization