Having a flash meter is still useful even if you're using TTL flash control.
Set your lights up and manually fire them at full power. That will allow you to
check lighting ratios and give you the aperture needed for correct exposure.
As long as you select a larger aperture than the flash meter calculated you
should always have enough flash power for correct exposure and the ratios
should be pretty close provided you're not also mixing in a lot of ambient
light...
--
Jim
---------- Original Message ----------------------------------
From: "Andreas Pirner" <AndreasPirner@xxxxxx>
Reply-To: olympus@xxxxxxxxxx
Date: Tue, 2 Nov 2004 19:08:59 +0100
>
>
>Dean Tyler wrote:
>> Presently, I have a T32 and BG2, and I am thinking of adding
>> another t32 for multiple flash.
>> Also, I am considering using a T32 on a stand with an umbrella.
>
>There are two basic, but very different approaches
>to flash photography with OM:
>a) Wire them, let the OM do the calculations TTL/OTF.
>b) Forget TTL/OTF, use Auto or Manual. (And use a
> flash meter to determine the amount of light).
>
>(a) is easy and nearly foolproof to use. Danger of
>wrong exposures, depending of subject reflecting
>properties (to much whites, or blacks, etc.).
>
>(b) could be set up to more (up to total) consistant
>results, but may be less spontanious.
>
>> Last question, I have a luna pro F meter and I must admit
>> I have rarely used it for flash measurements because I don't
>> know how to trigger the flash without taking a picture.
>
>Using the flash meter makes sense, when NOT using
>TTL/OTF metering. No need to actually fire a
>shot. Nearly all flash meters trigger by "seeing"
>a flash. That is, set up your arrangement, place the
>flash meter at the subject's spot, it's dome facing
>the lights (flashes, umbrellas, reflectors) and fire
>by pressing the flash's open flash button. The meter
>triggers automatically and measures and tells you what
>it has "seen". It usually does not to be hold or anything.
>At least that is what my flash meters do (no Luna F,
>but CalcuFlash and Minolta meters).
>
>> I have played around for the T32 with no film and it
>> appears to have three output intensities
>...
>
>The T32 has two manual settings, full and half power
>(GN 32m and GN 16m at ISO 100/21°), and three Auto
>settings (see flash manual).
>
>> I assume flash duration is the X factor.
>
>No. Flash duration just regulates amount of light.
>More duration = more light. Nothing to think about
>in the range of 1/50000 to 1/500 second.
>
>> I assume that with two T32s in manual mode (if
>> they can be > independently triggered for flash
>> readings) on stands with umbrellas would be a decent
>> mobile studio that would offer consistent light control.
>
>True.
>
>> Or should I buy a could cheap third party flashes?
>
>ALL flashes work as well in any no TTL/OTF setting.
>Easily to integrate using servo/slave flash cells.
>
>Main problem with all setups is the missing
>modelling light. You just do not see, how your
>(multiple) flash setup produces light, casts
>shadows, produces black/white ratios and on
>and on. That is the reason why you end up using
>studio flashes sooner or later for any studio
>setup ...
>
>Andreas
>
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