Darkroom & Studio Photographic Equipment
Sigma 52mm Macro Flash Adaptor for EM-140
Attachment ring to allow the Sigma EM-140 Macro Ring Flash to be fitted to lenses with a 52mm filter thread.
https://www.bizrate.co.uk/photography_darkroomequipment/sigma-52mm-macro-flash-adaptor-oid24206363202.html
