Summary: The Sony macro ringlight is a useful addition to certain sized macro lenses. However, with the included adapters, it is limited to 49 and 55 mm diameter lenses. Works OK with Minolta 100/2.8 macro, but not with the superb Tamron 180 macro. The light output is switchable between two levels of intensity. However, for some shots, even the higher of the two settings was not enough. Note: the HVL-RLAM is not a flash!!! The output is constant.
Summary: Sony HVLRLAM Ring Light for Sony Alpha Digital SLR is most importantly NOT a Flash unit. It will provide light for close-ups but is not really suitable for anything approaching professional use in macro photography. Its main limitation is the limited brightness of the LED lights. The unit will not permit the use of very small F-Stops that are often desired in macro photography. For hand held purposes about f5.6 is about all that you will be able to use.
Summary: I like to take close-up (and macro) photographs of flowers and other small images and this ring light is all that I could ask. It allows me to photograph in lousy ambient light without the resulting photograph showing the defect in the finished photo. I also have been able to take extreme closeups of my grandson without distracting shadows. (I can always adjust the perceived lighting when using Photograph CS3.