Tamron SP 35-105mm f/2.8 Aspherical is an excellent portrait lens with a fast and constant f/2.8 aperture. The 35-105mm employs aspherical elements to decrease various aberrations while reducing the fall-off of light at the corners. Photos are pleasant with warm colors and adequate contrast. The lens also produces a unique and smooth bokeh. Tamron combines it's Integrated-Focusing Cam system, Internal Focusing system and Triple-Cam zoom system combines to produce excellent optical performance.