Yes, I would recommend this to a friend

Consistent Output; Durable; Fast / accurate auto-focus; Rugged; Strong Construction

Poor in Low Light

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 versatile 18-200mm F/3.5-6.3 DC OS lens has been designed as an all-purpose lens for digital SLR cameras with 'APS-C size' image sensors. Offering an 11x zoom ratio and a minimum focusing distance of 45cm at all focal lengths, this lens will appeal to photographers who want a single,...

This is one of the cheapest lens in this category and is available in Canon, Nikon, Pentax, Sigma and Sony mounts...

Price; great chromatic aberration control

Inconsistent performance; low resolution at 200mm

An all-in-one superzoom lens with optical stabilisation for APS-C digital SLRs which prides a range equivalent to 27-300mm on a 35mm camera.

High zoom range; Decent sharpness at shorter focal lengths; Highly effective optical stabiliser; Price

Falloff in sharpness at 200mm; CA towards edges can be noticeable along high contrast edges; Slow AF at telephoto end

One of the limitations with a kit lens is that you don't have a great focal length range, especially at the telephoto end of the scale. This Sigma 18-200mm f/3.5-6.3 is not only small and light but also has an impressive optical stabiliser built-in (Canon and Nikon fits).

I can't write a review about this lens because it didn't fit my camera. it needed an adapter. Make sure you ask questions before buying I didn't ask had to find out the hard way. there are adapters that will fit the lens.