LED Macro Ring Light Model B for all macro lenses with 49mm, 52mm, 55mm, 58mm, 62mm, 67mm filter thread (Electronics)
After I had the problem with my cheap Manfrotto ring flash that it was useful to the earlier Sony Alpha A100 and A700, but constantly underexposures produced off the A55 and A77, which could not be reliably avoided by many corrective attempts I have