Sigma AF Zoom 28-70mm f/2.8

Great value Fantastic lens! Solid build quality and butter smooth focus ring. The additional items are a nice bonus for an already great value-for-performance lens.

Not as sharp or as good an AF as I had hoped. It's a nice solid lens, but the copy I got was not that sharp. Actually my Tamron 28-75 f2.8 G2 had a sharper picture and better AF. It could have just been a bad copy. It was a new lens however.

Worth the Extra Cost This is a Sigma "Art" lens, as opposed to one in the company's lower-end, cheaper "Contemporary" series. The difference between the Art lenses and the regular lenses is obvious after only a few photographs. I am a professional artist and photographer, and I already own the Sigma 85mm f/1.4 Art lens, so this 20-70mm f/2.8 is the complement in what will eventually be the "holy trinity," which include the 70-200mm f/2.8 Art lens. Once you have these lenses, you won't want to go back to ordinary lenses. Images have that special "something" that spoils the discerning professional or advanced amateur. I have included two of my digital artworks that began with photographs using the Sigma 20-70mm Art lens. They're worth the extra cost because they are, after all, really an investment in your talent.