In product photography is not always relies on a 50mm macro, but also attracts ever a default zoom (with me a Tamron 28-75mm F / 2.8 (D800) or Tamron 18-55 F2.8 (D300)) on. But what is this ??? The ring light sends a "wonderful" halo on my Tamron. In my D800 I had when using the Tamron and the light on the DX mode switch, so that the images are free of reflection. This of course makes little sense, since I would have to do without the services of my D800 20MP.
From technical fault I have remained so far been spared. Say all LEDs make the time what they are - lamps.