Bronica originally made a threaded disk that could be used like a lensboard to adapt press lenses to the 57x1mm screwmount. The disk would be drilled like a lensboard, and the lens could be attached with a normal retaining ring. To adapt a lens like the one you're describing, you would have a machinist make you a threaded disk to adapt the head of the Hektor to the screwmount, and since it would be a custom job, you could even have a tube made for correct infinity focus. I've had this sort of tube made by S.K. Grimes for a 500/5.5 Tele-Xenar for use with the Komura Uni Helical II on my Bronica S2a.
That said, the Nikkor-Q 135/3.5 is a very nice lens, so unless there is something really attractive about the look of the Hektor (which there might be, because it's a Heliar type isn't it? The Nikkor-Q is a Tessar-type), there might not be much of a reason to make this adaptation.
Last edited by David Goldfarb : 05-30-2008 at 18:44.