I recently ordered a used 50mm f2.8E lens for my ETRS, and that was what I expected to receive! <p> The advert said 50mm f2.8 E and the supplier's invoice says 50 f2.8E but the lens itself is marked MC, unlike my 75mm lens which is marked EII. <p> Presumably MC stands for multi-coated. <p> Info elsewhere on this site, and other sites on the Internet, seems to suggest that there are 4 different lenses (ie MC, E, EII and PE) for the Bronica. <p> Should my supplier have sent me an E lens? Have I been conned, or am I being paranoid?