Digital Outback Photo have published a review of the Canon EF 135mm f/2L USM lens.

“We find that the 135mm f/2 lens delivers more detail and also more contrast. Interesting how much people discuss the softness of the images from the cameras and leave the lenses out of the equation. For us the quality difference is reason enough to use in the future the 135mm f/2 as much as the scene allows. Many find the 135mm range kind of boring. But faced with the better image quality you would be surprised how well you can capture good frames with the 135mm lens by moving your body. Yes, there are situations where moving is not an option and here the zoom has clearly advantages.”

Website: Digital Outback Photo - Canon EF 135mm f/2L USM Lens Review