sth?
Set your exposure for the sunset at the sync speed of your camera (the advantage of leaf shutters here is obvious). Calculate the normal flash exposure for the subject from the dial on the flash. Dial down the power of the flash as needed to match the f-stop already set for the sunset exposure.
For instance if the sunset is f/5.6 at 125, and the flash dial says f/8 for your subjects, then you need to set the ratio control to 1/2 power. You can dial the flash exposure up or down a bit if you do not want the exposures exactly balanced.
As you can tell, you either need to be able to set a high shutter speed, or have a very powerful flash (400WS or so for full length portraits with 100-160 speed film), or be closer to your subjects (using a wideangle lens can help). Slower film helps a bunch too.
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Kostas Kavoussanakis wrote:
On Wed, 21 Jul 2004, graywolf wrote:
The best way I have found to do this kind of thing is manual exposure using a ratio controlled flash so you can balance the flash exposure to just exactly where you want it. I always find it easier to do these kinds of things myself than to figure out how to program the camera and flash to do it.
Is there an algorithm to calculate the correct ratio for fill-flash depending on aperture or sth?
Kostas
-- graywolf http://graywolfphoto.com/graywolf.html
