SIGMA 10-20 mm f/3.5 EX DC HSM Wide-angle Zoom Lens - for Canon

Very good performer. Sharp in the centre, and still good in the corners and edges at most focal lengths and apertures. Distortion minimal, and CA decent for this type of lens. Well made, smooth zooming action, and very good value.

Nothing

Doesn't attach to F mount correctly, only works in one setting and flash etc can't be used

Solidly built and better optics than N*kon equivalent.

No anti-shake system, but not really needed on a wide-angle lens.

Amazing pictures, good value for money and good build quality.

Shadows when using built-in flash

Great wide angle lens

Good image quality, including shots that would have not been possible without such a wide angle eg close up to buildings or indoors. Also dramatic landscapes.

Bulkier than expected.

Ease of use great picture quality value for money

A bit heavy

Good wide angle lens. Clear sharp pictures. Fits my Nikon D40X. Good value for the price and better value than the Nikon equivalent wide angle lens. Comes with sun shield for lens which is easy to fit and store in reverse position. Also came with a...

Lens cover is not so good. A bit flimsy and comes off very easily when in camera bag. Had to 3D print a new one!

Very wide angle lens great for those tight shots where you need to get as much in the frame as you can.

Can be a little slow on AF but I'm just nit picking.

Amazing results, opens up more possibilities