Re-adjusting a Luna Pro for silver oxide batteries

Discussion in 'Camera Building, Repairs & Modification' started by BetterSense, Dec 8, 2012.

  1. BetterSense

    BetterSense Member

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    I put silver-oxide batteries in my Luna-pro with a spacer. Now it reads about correct if I set the film speed about 2 stops slower than the film I'm actually using.

    Directions are here:

    http://www.graphic-fusion.com/lunapro.htm

    apparently there are potentiometers on the circuit board to 2-point calibrate both the high and low scales. However, I'm a bit worried I will mess it up and get the linearity wrong. I figure the meter is probably right on the way it is now. Has anyone ever done this procedure?
     
  2. Dan Fromm

    Dan Fromm Member

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    bs, its been a while since I checked so I'm not sure they're still available, but the right way to use a pair of, IIRC, SR-44s in a Lunapro that wants mercury batteries is to put then in Gossen's own adapter. While you're at it, you might as well send the meter to Gossen's US distributor -- used to be Bogen, now called Manfrotto and I think they're still it -- for a complete overhaul. Contact them.
     
  3. Dave Swinnard

    Dave Swinnard Subscriber

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    I second the Gossen battery adapter. I got a pair of them from B&H a few years ago. They work well and added life to a pair of old Luna Sixes.
     
  4. Mark Fisher

    Mark Fisher Subscriber

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    I sent it to gossen....it was like 30-40 dollars and it was recalibrated ad ready for the modern world