Summary: This lens produces very sharp images regardless if you're in macro or limiter mode. It also doubles up great as a portrait lens if you're on a crop sensor camera (bringing you up to 75mm). It's built quite well, feels solid in the hand, and isn't too heavy or light. It produces creamy smooth bokeh which makes portrait shots stand out wonderfully. Like stated above, the macro shots are amazingly sharp as well!
Pros: Pretty much everything you'd expect from the lens
Summary: This is overall a great lens. It produces very sharp images and is fast enough to do handheld shots at lower ratios than 1:4 magnification. For anything 1:1 through 1:4, I'd highly recommend a tripod as shutter speeds will quickly drop. The focus throw is very long, which means that it is slow to focus in some situations and tends to hunt a lot. The front element is very recessed, so the lens almost works as if it has a built-in hood.
Summary: Some critics have called this a 'dated' design. What if it was simply done right the first time? Humor aside, I picked this up as a companion for the 100M28, and between the two of them, there are very few macro to normal situations they cannot handle quite competently. A long term keeper.
Summary: i've worked with many macro lenses and many cameras, and I have to say that this lens tops them all. As soon as you feel it in your hands you know its just quality. The pictures that it takes are so crisp and bright. It really adds a lot of character to your photos! From the reviews I've read online say that this lens is overpriced, but I completely disagree. For great picture quality, you're not going to get it for pennies. The price is right for this lens!
Pros: Excellent picture quality everytime
Cons: In Full Mode it sometimes focuses in all ranges before it finds the correct focus