Review (Summary): "I've been shooting most of my portrait work with a 28-75mm zoom, but always felt I could use something longer. And I'm about at the point where fixed focal length lenses just won't do; once you get used to the flexibility of a zoom, you're spoiled. I also like a fast lens with a relatively wide maximum aperture, as I like to get way out-of-focus backgrounds. And that's where the new Sigma 50-150mm f/2.8 lens comes in.
Any gripes? Not really. I did ask Sigma about Vibration Reduction. I was told while it may be a possibility in the future, the added weight and cost would be considerations. I personally would take the size and weight advantage over the bigger lens. Wait a couple of years - I hear we'll be shooting at ISO 1600 with ISO 100 quality anyway!"
