Quote Originally Posted by bkarasek View Post
I'm in need of a clarification regarding the Vivitar 2x teleconverter. On the S2 and S2a, the lens and helicoid come apart, so you remove the helicoid, mount the 2x into the body, then the original helicoid, then the lens. It seems that on the S, the helicoid and lens are one piece. Is the rear of the S helicoid the same size as on the S2 and S2a? In other words, can the 2x tele be mounted on the Bronica S?

Any information would be very welcome.

I just had confirmation from a potential buyer that the the helicoid cannot be removed on the Bronica S, so this 2x will only fit the S2 and S2a and I presume the EC, since removal of the original focusing helicoid is a prerequisite to installing the 2x

Sorry about the error..... ignorance.