<p>For anyone reading this thread in the future and also confused about the term "sleeper," it's a good thing. It doesn't mean it puts you to sleep, it's a reference to "sleeper cars" in street racing/drag racing. It's a car that seems dull or even kind of crappy at first glace, but then has a ton of hidden power and easily beats expensive and flashy cars in performance. <br /><br />I know this is an old thread, but I am considering this lens and doing some research. I have an 80-200 2.8 AF-S, but I like small, fast lenses for indoor shots. My zoom is on its way out, I think (though I hope it's the brushes and not the motor), and I'm considering options. Of course, when the CX and mtb races are back on, I'll probably want the zoom. Ugh! Such choices!</p>