Sigma Flash Macro Ring EM-140 DG for Sigma SLR Cameras

This is a very nice macro ring flash. My photos are very well lit and the color is much more clear and true to real life. It is a bit larger and heavier than the Canon Ring Flash. It comes with 2 adapters so the flash may attach to your lens. I had to purchase a separate lens adapter for my Nikon Micro lens, however. I am very pleased with the product.