Sigma EM-140 Macro Ring Flash for Nikon AF is designed to work with both AF 35mm film and Digital SLR cameras of all-popular manufactures. The EM-140

Sigma EM-140 Macro Ring Flash for Nikon AF is designed to work with both AF 35mm film and Digital SLR cameras of all-popular manufactures. The EM-140 Ring Flash is ideal for photographing subjects in fine detail when the shadowless mode is used, and is extremely effective for scientific and medical applications.