RF calibration for Mamiya 6 and 7's ?

[mrisney]

I know this has been asked before. Is there a recommendation for RF calibrations for the Mamiya RF'ers ? I would gladly send my Mamiya 6's and accompanying lenses out to someone who does this, in the back of my mind the MAC Group (75 Virginia Road, North White Plains, NY 10603) doesn't do calibrations at a decent price, or do them at all, is that right ?

I have picked up 150 for my Mamiya 6, it definetly is not calibrated, my first roll back, images are a mess, not so with the 75mm, should the 50mm be calibrated as well ?

Thanks

 

[brian steinberger]

Bob at Precision Camera Works in Chicago. He's the best..

http://www.precisioncameraworks.com/

 

[rpsawin]

Bob at Precision Camera Works in Chicago. He's the best..

http://www.precisioncameraworks.com/

+1...good people and top flight service.

 

[bastian a.]

Maybe there is a Mamiya branch in the US, too.
A few weeks ago my Mamiya 6 was repaired at the Mamiya Service Germany (in Munich) and they did a very good job.

 

[KenR]

My Mamiya 6 needed to be recalibrated and some other minor work done on it after a few years of moderate use. I sent it off to Mamiya in Westchester - they did the work efficiently and did a fine job. I was not outraged by the price (although I do recall that it was expensive).

 

[t.s.k.]

+1 on contacting Precision Camera Works (http://www.precisioncameraworks.com)
I visit the shop fairly regularly and Bob always has a few Mamiya RFs in various stages of dis/repair.
IIRC 3 years ago, the calibration for my M-6 w 3 lenses was around $100 with a quick turnaround.

 

[dtcls100]

I have picked up 150 for my Mamiya 6, it definetly is not calibrated, my first roll back, images are a mess, not so with the 75mm, should the 50mm be calibrated as well ?

You may not need to have the lenses calibrated at all, as the lenses may be properly calibrated to begin with. You may simply need to have your rangefinder adjusted. The 150mm with its very limited depth of field is much more unforgiving than the 75mm and 50mm with regards to the rangefinder being very slightly off. The 75mm and 50mm may not be affected by very slight focusing errors at all, while it may be glaringly obvious with the 150mm. Before sending your lenses out to be calibrated, I would check your rangefinder accuracy by mounting the 150mm, the 75mm, and 50mm and checking each of their infinity focus against a full moon in the sky. I did this with each of my four Mamiya 6 bodies, and made the appropriate rangefinder adjustment as necessary and now they each work great with my two 50mm, one 75mm, and one 150mm lenses.

Also, you absolutely should use the moon as your infinity target, as using a distant building is not far enough to adjust the rangefinder in the Mamiya 6.