Hello Len, I truly appreciate your response. Helpful to me also your reference to the OM-D E-M5 and the M lenses since I have a few Leica M lenses including a 60mm macro which mounted on the Visoflex. Are you using the Novoflex adapters for the 4/3? Since I posted my question I have found the Leitax flange for my Vario-Elmar 35-70 F3.5 objective with several good reviews from users and prompt response to inquiries. I appreciate you kind disposition and if you wish we may extend our dialogue through firstname.lastname@example.org.