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Thread: how to calculate the max. ET????

  1. #1
    OptiBoard Apprentice
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    Confused how to calculate the max. ET????

    hi all

    how can i calculate the max. ET of a SV with cylinder??

    does anyone have the formula to calculate the min. ET and max. ET of single vision lenses??

    thanks - mike

  2. #2
    Master OptiBoarder
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    Mike,

    Do yourself a favor and pick up a copy of Optical Formulas Tutorial, by Stoner, Perkins, Ferguson.

    It is packed with all the formulas that you may need, it explains how to figure them out, and is a valuable tool in any optical professionals bag.

  3. #3
    OptiBoard Apprentice
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    where can i get it?

  4. #4
    OptiBoard Apprentice
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    Just ordered myself a copy from amazon.com. $51 new

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