The Sigma 18-125mm F3.8-5.6 DC OS HSM is a high ratio zoom lens which is designed exclusively for digital SLR cameras
This compact high zoom ratio lens incorporates Sigma's original OS (Optical Stabilizer) function. This system uses two sensors inside the lens to detect vertical andhorizontal movement of the camera and works by moving an optical image stabilizing lens group to effectively compensate for camera shake. It offers the use of shutter speeds approximately 4 stops slower.
It is the ideal lens for several type of photography such as wide-angle, telephoto and close-up. SLD (Special Low Dispersion) glass, a molded glass aspherical lens and two hybrid aspherical lenses provide excellent correction for all types of aberrations. The super multi-layer coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range.
This lens has a minimum focusing distance of 35cm (13.8") at all focal lengths, and has maximum magnification of 1:3.8, making it ideal for close-up photography. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed autofocus.
I shoot 1300 automotive photos each week and put them on line - It has been a welcome change to the EFS-18-55mm
I bought this lense because it have everything I need.
Good lens for travle. Depending on type of wild life good for that too. Very sharp, good auto focuse.
I use this on my Pentax K10, lens is ideal for everyday use, especially indoors where sometimes you need a wide angle lens, and then go outside where you might need a long zoom lens. It is not weather resistant like the Pentax DA lenses are.
good for travel
I like this one almost better than the 70-300....but need it for the macro jobs
This is a good lens to travel with because of it's zoom range. Super quite focus. It's also good as an event lens, like birthday party's, weddings etc. Seems a little heavy for the size.
Great as an all purpose lens. I like the markings on the lens, vivid, clear and easy to read.
I bought this lens used at Adorama.[...]. The lens is ok, but really HEAVY and just so/so image quality, especially at the edges. I would recommend it though.
This lens is much better than the canon consumer lenses in my opinion. It may have a slight front focusing issue and if it does I'll send it back to sigma for an adjustment or use it as an excuse to upgrade to the 50D with micro adjustment instead of sending it back to the retailer so everyone else can take the time and expense of correcting a common problem with most lenses.