Preface I was looking to a wider addition to my TAMRON SP17-50/2.

Beautiful mechanics; Extremely low distortion

Very poor edge sharpness; Disaster corner sharpness; Vary poor performance against the light

Lens- specifications landscape or wide a screen sigma 8 -- 16 mm suitable for my needs very hobby , basically get photographed , detail and clean the shooting lens- sigma this . Mugnkin would be much better if diagframa can wider than a series of these . Overall excellent.

The Sigma 8-16mm F4.5-5.6 DS HSM ($1,100 list) is a lens that either speaks directly to your soul or you find nearly impossible to use effectively. It's available for Sigma, Canon, Nikon, Sony/Minolta, and Pentax APS-C cameras , where it produces a field of view equivalent to 12-24mm in classic 35mm...

Very, very wide; One-of-a-kind lens

Extreme distortion on the wide end; Relatively slow aperture; Softer at wide angles

This is an in-depth review of the Sigma 8-16mm f/4.5-f/5.6 DC HSM lens; the model tested had the Pentax-K mount.

A unique wide angle lens for APS-C cameras providing a rectilinear field of view equivalent to that of a 12-24mm lens on a 35mm camera.

Outstanding sharpness in the centre; Excellent build; Unique wide angle field of view for APS-C cameras; Compact dimensions; Silent focusing; Low distortion

CA towards edges of the frame at 8mm; Falloff at 8mm; No way to attach filters

Wide-angle lenses are essential for landscape photography, which is one of, if not the most popular, photographic genre. So when a brand new ultra wide-angle lens hits the shelves it's always going to be of interest to many of us.

This is my favourite lens without a shadow of a doubt. It's superb for landscapes and producing amazingly artistic photos from all manner of subjects. It's sharp as a knife and tough too.

I use it for almost everything. I love the depth of field. so far nothing I don't like about this lens

If you're in the market for a very wide angle zoom, this one is certainly worth considering.While there is distortion, that's to be expected with this type lens. The images it produces are, in a word, sharp.Its maximum f-stop tends to make shooting dim interiors difficult without a support

Consistent Output; Easily Interchangeable; Lightweight

Poor in Low Light

With two 10-20mm lenses already within the Sigma stable, how exactly does this superwide offering fit into the line-up?

Excellent 8mm performance

Weaker 16mm performance