Ok, thanks. Power storage capacity vs. what gets delivered to the
subject 10 feet away.
Chuck Norcutt
Tim Hughes wrote:
>>> how do you know that<<
> Chuck,
> From calculation, knowing the voltage and capacitance.
>
> There are some very old threads where I listed a comparison of relative
> efficiency in a range of
> common Sunpak ,oly,metz etc flashes with compared normalised GN's, normalised
> for nominal areal
> coverage and energy. To do it properly you would need to integarate light
> output with an
> integrating sphere to get BCPS etc rather than rely on assumed similar light
> pattern uniformity
> from different flash vendors.
>
> T20's are a lot less efficient than T32's.
>
> Tim Hughes
>
> --- Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
>> Thanks and how do you know that?
>>
>> Dr. Flash
>>
>> Tim Hughes wrote:
>>> Chuck,
>>> The T32's are actually 70J.
>>> Studio units tend to waste the light produced a bit more (reflectors less
>>> effective) and also
>> with
>>> larger tubes the lamp conversion efficiency is a little lower.
>>>
>>> Tim Hughes
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