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Sigma Optimization Numbers

3 Jan 2018 6:15PM
What is the correlation between Nikon's AF Fine Tune adjustment numbers and the values used in Sigma Optimization Pro?
I once read the the Sigma values to use are half the Nikon AF Fine Tune numbers. So a Nikon AF adjustment of +6 would be a + 3 in Sigma Optimization Pro.
I would appreciate some advice and help? Thank you.

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