The Tamron 85mm F1.8 claims the title of the world's first fast-aperture 85mm lens with stabilization. The focal length will certainly appeal to portrait photographers, and the combination of Tamron's vibration compensation with an F1.8 aperture might just give it an edge in low light situations. We've been shooting with it over the past couple of weeks, both on full-frame and crop sensor bodies, to get an idea of its performance.