Sharp, very sharp
F2.8 at infinity
Beautiful bokeh
Nice smooth manual focus
Autofocus speed similar to my other AFS lenses

Perhaps a bit pricey compared with other non major brand macro lenses, but who else does 150mm at F2.8 ?

Beautiful lens, this is the heaviest I own so far, the front glass is 72mm and the glass is almost the 72mm, back end lens is also bigger then any of my previous lenses (nikon 18-200 vr, nikon 35mm f.18, tokina 116 F2.8) , it's heavy but not to long, making it very balanced and allowing me to take hand held photos at 1/250 with no blurriness. The autofocus is precise and I found it not slower or less precise than any of my other lenses. This is so far the sharpest lens I own, I have compared 100% crops from the 18-200 VR lens at F8 and the sigma 150 is noticeable sharper, nothing scientific, just my evaluation.
Using the focus ring for manual focus is a pleasure, it is slow, smooth and precise, it reminds me of the old lenses I used in the film cameras back in the 80's.
The tripod ring that comes with the lens is fantastic, I have a cheap tripod an it helps me level the camera, it is designed to have a perfect balance between the lens weight and the camera weight ( Nikon D300), also makes it very easy to remove or reinstall the camera on the tripod. Bokeh ? very very smooth better than my 35mm at f1.8.
The lens says it is F2.8, it was a bit of surprise to me that F2.8 is only valid when focused at infinity, the max aperture becomes smaller as you focus closer being it F5.6 at the closest focusing distance. But ... it doesn't really matter, F2.8 at 150mm focusing at 0.38 meters gives such a shallow DOF that I think it is unusable, I found my self using F11 to F32 when shooting macro.
I've been shooting in "Neutral" mode, and getting beautiful colors and contrast, whereas other lenses usually get a bit of a washed out image and contrast has to be improved in Post Processing.

Customer Service

not used

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I have taken "macro" images with the 18-55, 35mm , 200mm lenses although none of these are a real macro lens , the quality of the image and level of magnification of the sigma 150mm is way better.

- Very Stealthily Silent
- Crisp results
- Nice Outdoor colors
- Nice finishing
- Comes with its own cushioned box and strap

- Some Autofocus Hunting
- Fat
- Heavy
- Needs a tripod for fine photos

The nice thing about this lens is that its perfect for alert insects, you can shoot them without alarming them from a distance of 3 feet (1 meter) maintaining high details and crisp color. That if you are Hulk Hogan and can hold it still (You do need a tripod to avoid the shaking)

It is more silent than a snake on wet green grass, you merely hear the motor in the wild.

It do hunts a bit (if your centering your focus on a solid non textured color) - but you can assist it a bit

A wonderful but heavy and bulky lens, The lens foot adds a bit to its barrell width so its difficult to fit it with the other lenses in the bag.

Photos are wonderfull

Customer Service

I Highly recommend Grand Stores in Dubai - Ibn Battuta Branch are very Knowledgeable and helpful - Especially Arnel, Hector & Ahmad.

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I will compare to Macro only
Best in Sigma's Macros (to 50mm & 105mm)

Very heavy, I found my example slow if using the AF, sharpness not up there with the best of them, but this lens does fill a niche for many digital photographers.

Generally ok.

SHARP - Solid build - nice finish - silent HSM focusing - nice and sturdy tripod collar - SHARP - very nice to manual focus - manual focus override works very well - Sharp - did I mention it's sharp ? even wide open very sharp
very nice and sharp mid-tele range - SHARP

Heavy
If you do not use the focus limiter, it can hunt alot, even in bright light, but that's common for macros
image sharpness decreases already beyond f11- maybe that's why it has only f22 (at least for Nikon mount)

I was torn between Nikon 180 F2.8 AF-S and this Sigma lens. I finally opted for the Sigma because of it's macro capabilities and never lookd back.
The max 2.8 aperture allows you to isolated your subject form the background.
Focusing is fast enough for all but the most demanding tracking of sports action

Customer Service

Not used

Build quality Pictures are very sharp Great lens for the cost

None that I can think of now.

I bought this lens because I've wanted to get a Macro lens, and a task at my work required the use of a macro lens. So far the pictures I have gotten out of this lens have been awsome. It is kinda heavy, but that is because of the build quality. It feels like a quality lens.

Customer Service

Never had to use it. (Thats after buying 4 other Sigma lenses!)

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My first true macro lens