Excerpt: The Canon EF 100mm f/2 USM Lens - meet the Canon EF 85mm f/1.8 USM Lens' twin sibling. Put these two lenses side by side and you will need to read the numbers to tell them apart. That is a good thing.
Conclusion: The Canon EF 100mm f/2 USM is one of the "can't loose" offers in the Canon lens lineup. It performed almost flawlessly in all tested categories. It's interesting that the figures are marginally better compared to its more popular sister lens (EF 85mm f/1.8 USM). So if you can't or don't want to invest into Canon L glass the EF 100mm f/2 USM is a pretty obvious solution providing similar qualities at a much lower price. Highly recommended!