Sigma 150mm f/2.8 EX DG HSM APO HSM IF Macro Lens for Nikon SLR Cameras

I have nothing bad to say about this lens. It's very sharp, fast focusing and tough build. I also like the additional working distance over my 90mm macro lens.

On nikon mount: pretty good working distance (1:1 magnification at shortest distance, magnification decreases as distance increases), needs a tripod to start working with. The autofocus - though you don't really need it in macro - is silent but spends a lot of time searching in low light conditions (no miracles!). Really sharp.

Great product with excellent quality and crisp framing. The image quality is very high and possibly better than the SIGMA brother that works at 180mm.
Macro photography gets a real improvement through this lens especially when insects are concerned. Actually, the focusing distance is usually more than adequate to keep the photographer rather away from the framed insect so to avoid any disturbances or unwanted interactions.
I love it!Sigma 120-400mm f/4.5-5.6 AF APO DG OS HSM Telephoto Zoom Lens for Nikon Digital SLR Cameras

I've owned this lens for about 5 months now, and it is exceptional. Sharpness and color rendition are spot on and it is difficult to imagine any improvement (this lens really is tack sharp, it is a bit sharper than the 600mm IS). The extra 50mm on top of "typical" 100mm macros provides needed working distance with skittish insects. AF is quick (for a macro), silent, and accurate (for a macro). It even doubles as a pretty good tele, except that the focus speed cannot compete with a real tele. All macros are this way since the focus speed is compromised by the need to rack out the optics far enough to focus at 1:1. Does portraits too, though your subjects might find the optics to be a bit too sharp for their liking.

The focus limiter is a thoughtful and useful touch, as is the tripod ring. The build on this lens is excellent and it feels like a tank. Friction on the focus ring is perfectly damped which is especially important for a macro lens. The finish is nice and has held up to some heavy use (which is surprising since the same has NOT occured with the 50-500mm Bigma). No complaints at all with this lens. I recommend this lens over all of the ~100mm competitors due to the extra 50mm of reach, especially if you work with insects.

Sigma has hit a home run here. This is a nice macro lens, and also serves well as a short tele lens. Set the limiter and let the fast ad quiet HSM focusing work for you in tele-mode. In close-up/macro mode, the AF is less useful (but can often get you close to where you want to be quickly), then fine tune manually. Images are SUPER sharp, good color, excellent bokeh. Excellent price, and EX fit and finish is superb. Very very highly reccomended.