loose focus ring on Mamiya 6 150

[joshua daniels]

I recently acquired a Mamiya 6 with 3 lenses - great system. I'm

trying to determine how to adjust / repair a loose focusing ring on

the 150 lens. The ring can move back and forth (rotationally) about

20-30 degrees before it starts to move the actual focus helical of the

lens. It's not a big deal, but I'd like to get it corrected. The lens

does not seem to have an loose internal parts, and once you engage the

helical, the lens focuses fine. Any thoughts / suggestions?

[nico_.]

Not sure what kind of suggestions you would like to have except the usual "have it serviced by Mamiya". My only suggestion would be to also send along your M6 so that they can match its rangefinder with the lens. This is said to improve the ability to focus the 150mm precisely. It made things a bit better for me. Now, if I only were to get new glasses I could hopefully focus reliably at close range and full aperture...