Review on Sony SAL-135F18Z: High-performance 135mm f/1.8 Carl Zeiss Sonnar T Telephoto Lens for Sony Alpha Digital SLR Camera by Scot Hughes

This lens is the pinnacle of technology and optical quality for portrait artists. Although it's a bit difficult to use on the mirrorless A7R, I haven't taken this lens off the camera since I've had it. Images are rendered beautifully and the bokeh at f/1.8 is amazing. The center of the image is very sharp when the aperture is wide open and makes for incredible shots.