Great lens for weddings and group events. I also use a Nikon 80-400 VR, so with this new Sigma 17-70mm OS I can cover most situations.

Consistent Output; Durable; Easily Interchangeable; Fast / accurate auto-focus; Lens lock 2 prevent creep; Multi-purpose; Nice Bokeh; Rugged; Strong Construction

I bought this lens after a massive amount of research, I wanted to find a lens that compromised of two possible lens into one big lens so it would be easier to carry around. I also was feeling very limited by the current lens I had which was Canon 18-55mm basic kit lens.

Cheap; good build; good quality photos; large focal range; no front element rotation

A bit soft at 200mm

SIGMA PRODUCTS TEND TO A QUALITY OF EXCELLENCE, FOR IT IS SO EASY AND SAFE WORKING WITH YOUR PRODUCT WHATSOEVER SEGMENT, SUCH AS LENSES FLASHES ETC.

Tried this instead of an canon lens and the images are the same

Sigma's long-awaited, second Optical Stabilizer (OS) lens ($549, street) is an 11.1X digital-only superzoom with one SLD and three aspheric elements. A 29-320mm equivalent, it follows Sigma's first OS lens, an 80-400mm f/4.5-5.6 ($999, street), by more than four years, and outdoes its predecessor...

The Superzoom category of interchangeable lenses is becoming one of the most hotly contested areas of technology in the digital age and virtually everyone is trying to get in on the act. The Sigma 18-200mm is the latest to reach the dealers' showcases.

Good stabilisation system; Good build quality; Decent optical performance for type; Reasonably price

The negative points are; Heavier than some; Some CA around the edges at wider apertures; Barrel distortion at the wide end

Sigma 18-200mm f/3.5-6.3 DC lens is one of Sigma's DC lenses specifically designed for APS-C type dSLR cameras and has a reduced imaging circle, which means it will not be usable on full-frame cameras (the lens will actually fit the full-frame camera, but will vignette heavily because of the smaller...

I do not have plans to complete a full Sigma 18-200mm f/3.5-6.3 DC OS Lens review. Hopefully the information and standard test result provided are helpful to you. Pictured below from left to right (ordered by extended size with lens hoods) are the: 1. Canon EF-S 18-55mm f/3.5-5.6 IS Kit Lens 2.

Although Sigma released their first lens with a built-in Optical Stabilizer (OS) system in the spring of 2004, the company employed this technology in only one pro-grade lens, the 80-400mm f/4.5-5.6. That has changed with the introduction of a more compact/affordable (digital-only) 18-200mm OS zoom.

Huge 11x focal length range, ideal general purpose and travel lens ; Relatively low chromatic aberration; Low distortion (for a superzoom); Reasonably effective optical stabilization system, 2.5 - 3 stops benefit;

Very inconsistent sharpness through the zoom range - extremely soft at 80mm; Soft corners at all focal lengths; Occasionally indecisive autofocus; Slightly less resistant to flare than its more recent competitors;