Lommen's instructions are how I learned it. Still frustrating. Twice I have found Kalarts that, despite being in good condition, just would not calibrate no matter what. Replacing them whole fixed the issue. So take up Jac's offer if it just doesn't seem like it's going to work.
I still have one 4x5 Speed with a properly matched 127mm Ektar. I am not touching it no matter what silly lens I might wish was calibrated on it
. I've calibrated about a dozen or so and would be happy to never do that again.
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