Thanks, John.
Anything counter-intuitive asks for investigation - so my physics
teachers told me long ago.
I guess it has to do with the maximum capacity of the generator unit.
Either it delivers maximum current to one flash tube, GN 28, or it
splits its energy over two reflectors, reducing them both to GN 14-15.
Two reflectors which GN 15 each optically add up to one unit with GN
22. (sqrt(2) * GN)
Is it really this simple or what? I have no idea if this 'splitting
energy' thing is a linear process indeed...
Frank.
On Mon, 29 Jun 1998 22:10:21 -0400, "John Petrush"
<jpetrush@xxxxxxxxx> wrote:
>>Frank,
>>
>>I was talking with the Olympus folks about another matter and remembered
>>this post. The T28 Twin Flash with both reflectors has a GN of 22 - total.
>>It is not GN 22 per reflector. This struck me as a bit counter-intuitive
>>but that's what the technical person (support engineer) said.
>>
>>John P
>>
>>Frank Van Lindert wrote:
>>
>>>My (German) Olympus Product Lexicon says:
>>>T28 Twin Flash with 1 reflector in use or T28 Single Flash: Guide
>>>number 28, manually switchable to 14.
>>>T28 Twin Flash with both reflectors in use: Guide number 22.
>>>All guide numbers in meters at ISO 100 and 1 meter distance to object.
>>>
>>>I take it (but I can't read it anywhere) that the GN 22 is per
>>>reflector. 2 reflectors would give 1.4 x 22 = 31 meters, which is
>>>about the maximum the T1 generator will yield (being basically the
>>>same unit as the T-32 flash).
>>>
>>>But I am not sure here...
>>>
>>>
>>
>>
>
>
>
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