I recently bought a Zenzanon 50mm f2.8E lens for my Bronica ETRS. <p> The advert described it as an "E". The supplier maintains it's an "E" and their invoice states that it's an "E". The box says it's an "E" and the serial number on the box corresponds with number on the lens. But, the lens itself is only marked "MC". <p> It's been suggested that an "MC" lenses are inferior, or predate, "E" lenses and I realize that "EII", and the more recent "PE", lenses are better than "E" lenses. <p> I would like to know if the "E" lenses were marked "E" or not! I would really like to know if my lens is an "E", or not! <p> I'm getting conflicting advice - and a bit confused! Some people say one thing, others say something else. <p> Surely, someone out there must be an expert on Bronica lenses? <p> Please help! <p> Thank you.