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  1. #11
    A49
    A49 is offline

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    Quote Originally Posted by alanrockwood View Post
    Actually, the formula is a mathematically rigorous result under the conditions described in my post. It can be derived by a fairly simple derivation involving the moments of a distribution, though I don't recall the details of the derivation at the moment. It even applies to distributions that do not have a finite second moment, such as the Lorentzian function, provided one defines peak width in a slightly different way.
    Sorry, but that is too much mathematics for me, even for me who likes theorising about photographic relation. I just can´t follow. Nevertheless it was very useful for me to see that the exponents in the system´s resolution formulae can vary with the conditions you use it for. It seems that for the Perez / Thalmann conditions the squared fractions are more adequate.

    Kind regards,
    Andreas

  2. #12

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    A49,

    You lost me after "Hi folks!".

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