I’ve had the Canon 135 f/2 L series lens in my possession for over two months now, and it has completely exceeded initial expectation - now sitting in the line as my favorite lens, ahead of the marvelous Canon 24-70 f/2.8L.
Sharp wide open at f/2, super fast autofocus, a beautiful smooth depth of field at low aperture settings, and a perfect focal length for long range landscape/short range sports are a few of the areas where this lens really shines.
One of the things I’ve been most pleased with other than the sharpness wide open is the superb autofocus performance. When the lens is switched to focus at 1.6 meters to infinity, focus locks in at a rapid pace, perfect for fast moving subjects in the distance. When set to 0.9 meters to infinity, the Canon 135L becomes a versatile lens allowing excellent macro and close up images to be taken.
The Canon 135L has made me fall in love with prime lenses all again, the same way the Canon 50 f/1.4 did. While the Canon 24-70L is an excellent zoom lens, it never took this kind of effect on me or my images. The 135L will be attached to my camera for some time to come.