The rings work fine with my 50mm prime lens Sony SLT A57 at my. As long as you use the single rings no problem. The autofocus works. But combinations are rarely useful. The 36mm-ring sufficiently increased. Lots of light is recommended. A ring flash / lamp is certainly helpful. Offered here at Amazon for about 50. Although they are no substitute for a macro lens, but a good and preiwerte stopgap. Although "Made in China", good workmanship. (Why not?) Manual in English only.