"The image quality of this lens is superb, nicely sharp and great bokeh. Although it's IS is noisy and chromatic aberration is sometimes quite noticeable. But otherwise, it's great."

v.good

This is a wonderful macro lens that rivals the Nikon and Canon big guns for sharpness. Great value and the built in optical stabilizer is perfect when using it as a portrait lens, which it also excels at.

Super sharp!! Great lens all around. It does have a clunking sound when the lens is off the camera body but this is normal and does not mean the OS is broken.

Great lens for macro but not for portraits what i have observed is that it struggles a little in auto focus also the optical stabilisation is bit noisy. Plus the lens is not weather sealed Sharpness is less than that of the canon.

I've been shooting this lens for a few weeks and have pretty much left it on my second body (I was using a 50-200 or a 70-300 on it). Most people use it for macro but I really got it to extend the range of my Sigma 17-50 f/2.8 OS and it fills in beautifully for most things.

Great bokeh; fast lens; sharp

none

Dive into a whole new world of photography with an affordable third-party macro lens such as this Sigma model. The Sigma 105mm f/2.8 is available in Canon, Nikon, Sony and Sigma mounts, fitting full-frame and APS-C D-SLRs.

If I could give this no stars I would!!!!! After receiving this lens from overstock I quickly realized it was a grey market lens and that I couldn't even register for the warranty because it's for another country and I can't even read the language!!!!!!

This large aperture medium telephoto macro lens offers advanced performance of close-up photography. Sigma's own proprietary OS (Optical Stabilizer) system enables handheld close-up photography.

Canon lists six lenses on their site under the macro section and Nikon lists 10, so is it even worth looking into 3rd party companies like Sigma In the recent past, the popular answer was no, but as time keeps on ticking, the 3rd party companies are really upping their game.