Yes. It works pretty well. It's not as fast as native, but it's reasonably quick, especially in good light, provided you aren't changing focus distance drastically. (going from very close to far takes longer, but it's still fine). It can even track decently in CAF, though I wouldn't use it for serious sport work. It slows down quite a lot in dim light, however (though I don't tend to use f/4 zooms in dim light). For what I shoot, it made way more sense than the Sony route. Had the adapter (use it with my EF 100/2) and so it was $600 new vs. $1500 new. Buying used still would be a huge savings (around $425 vs. $950). Optically stellar.