Sigma 14mm F2.8 EX Aspherical HSM Lens for Pentax AF

Great lens and excellent deal if you can find a quality one used.Beautiful quality macro lensPros:Lightweight, internal focus, useful telephoto range lensCons:Now discontinued. F3.5 fastest aperture (minor)

If you are looking for a good, affordable "walk around" lens, this is it!Great "Walk around" LensPros:Good Image Quality, Price, Wide RangeCons:Can use only one filter lens at a time with minimal vignetting

Optically good despite vast zoom range; much better than Tamron version. At 200mm, I must focus parfocally (focus at 135mm, shoot at 200mm) to get correct focus.Optically sharp, but focus errors at 200mm on distant objectsPros:Small, compact. Good...

The 150mm macro produces exceptional results in a unique focal length range that's suitable for many uses. I very much enjoy mine!Sigma 150mm f/2.8 EX DG Macro, a portal to the macro worldPros:Build, sharpness, color rendition, price, silent...

Optically good, despite vast range. At 200mm, I must focus parfocally (focus at 135mm, shoot at 200mm) to get sharp pics. Optics much better than Tamron version.Optically sharp, but focus errors at 200mm on distant objectsPros:Small, compact. Good...

Small, cheap, LOTS of zoom, but crop factor takes away wide angle. Sharp up to 200mm, still decent at 300mm. Tamron XR version is a coke bottle by comparison.Versatile "swiss-army" lens. Sharper than its Tamron counterpartPros:Surprisingly...

Stay Away from this one.Sigma misses the markPros:covers a large rangeCons:Read review body

Get it if you're looking for convenience, low price, low weight and quality. It's a keeper!Best lens I've ownedPros:Lightweight, compact, inexpensiveCons:None

Unless you DON'T really care about quality, and DO really need 28mm to 300mm in one lens, save your money.I wasted my money.Pros:Lightweight, inexpensiveCons:Vignetting, optical quality, build quality