RE: [Leica] Ambient light + Strobe metering question

["eric korenman" <leica_korenman@hotmail.com>]

I am using completely manual setup with a 320 w/s monolight which I can dial 
up/down power ouptut.
I am trying to figure out how to measure flash output with an incident meter 
and isolate that measurement from ambient light.  Or is this really not a 
significant difference in most situations?

Eric


>From: "Don Dory" <dorysrus@mindspring.com>
>Reply-To: leica-users@mejac.palo-alto.ca.us
>To: <leica-users@mejac.palo-alto.ca.us>
>Subject: RE: [Leica] Ambient light + Strobe metering question
>Date: Wed, 3 Mar 2004 07:23:43 -0500
>
>Eric,
>If you have a manual flash then the appropriate Fstop for the flash is
>based on distance of the flash to the subject (based on guide number or
>power output of the flash).  The drill would be set ambient exposure
>making sure your shutter speed is not higher than the flash synch speed,
>focus, check distance/Fstop on the flash, reset ambient exposure so the
>Fstop corresponds to what the flash needs.  This is a lot easier if you
>have a flash with variable power like the old Vivitar 283's or a lot of
>the Metz units.
>
>In the modern age, if you have a TTL flash system, the camera adjusts
>the flash so you get fill without thinking.
>
>
>Don
>dorysrus@mindspring.com
>
>-----Original Message-----
>From: owner-leica-users@mejac.palo-alto.ca.us
>[mailto:owner-leica-users@mejac.palo-alto.ca.us] On Behalf Of eric
>Sent: Tuesday, March 02, 2004 10:27 PM
>To: LUG
>Subject: [Leica] Ambient light + Strobe metering question
>
>A photo technique book I was reading has a chapter on using a strobe for
>fill light.
>As an example, the author discussing an ambient lit scene which meters f
>5.6
>at 1/125 sec
>He then discusses the use of a strobe set to output of 5.6 and varying
>the
>shutter speed to add or subtract ambient light.
>
>Question:
>When shooting outdoors and metering a scene (ambient light + strobe),
>how do
>I
>isolate the f stop output of the strobe?
>Do I meter ambient light, then meter ambient light + strobe and use the
>difference to
>figure my flash output?
>Do I just subtract f stops to figure the flash output?
>
>thanks,
>flash newbie Eric.
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>
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