Archived posting to the Leica Users Group, 1998/05/13

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Subject: Re: [Leica] no one can help on this one?
From: Five Senses Productions <fls@5senses.com>
Date: Wed, 13 May 1998 11:49:46 -0700

1/50 @ f/11 is not the ambient exposure....it is the FLASH exposure I am
getting.  
I see that fill should be f/6.3 when 1/50 @ f/11 is the flash exposure, but
if the
flash only has one output setting, then gels or softboxes are my only option
unless I get a more modern flash that does fill, right?

At 01:24 PM 5/13/98 -0400, ATanabe wrote:
>Francesco,
>If you want 1-2/3 stop fill ratio, you can decrease the power output from
your
>flash unit.  Or purchase some ND gels (ROSCO) that go over theatrical or
movie
>lights.  Gradations of 0.3 equal one stop, refered to as N3s or ND3s or any
>combination.  You can also purchase ND with warming characteristics, see your
>local movie grip supplier for complete assortment (they have sample books).
>Most times the sample size gels are perfect for smaller flash units.  
>Different effects such as overpowering the subject and darkening the
>background (Annie Liebowitz circa 1980) needs large flash units and or high
>sync speeds.  For brighttening the background you need to extend the shutter
>speed.  For fill flash, regulate the output of the flash.  If the ambient
>exposure is 1/50 @f 11, fill flash output should be f 6.3.  For equal
>brightness the flash output should be at f 11.  To overpower the scene and
>darken the background, flash should be f 16 or greater and lense set
>accordingly.  Hope this helps
>Al
> 


Francesco Sanfilippo,
Five Senses Productions
webmaster@5senses.com


http://www.5senses.com/