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Zoom Level Question

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  • Zoom Level Question

    Hi,

    F=4.5mm => Z00 (Zoom Level at Zero)
    F=45mm => Z99 (Zoom Level at 99)

    And in the midle positions?...

    Is there any formula to give the correct "F" for the diferente Zoom Level (From 00 to 99)?

    Best Regards,

    J+

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