best fill light flash settings
Yup, another post intended as one of the entries in the question & answer series, but somehow expanded into a post which should stand on its own. The question that popped up in my webstats was: ‘best fill light flash settings’
First, we need to understand that there is a whole range of ratios in which we can balance available light with flash.
A whole range in how we mix flash and available light. Anywhere from:
- correct ambient exposure with just a touch of fill-flash,
all the way to where we:
- under-expose the ambient light, and use flash to give us the correct exposure.
There are of course numerous possibilities inbetween those two scenarios. None of which are particularly more ‘correct’ than the other ways we match flash and available light. For simplicity of explanation though, it is easier to describe the two ‘extremes’, and hopefully this will make it easy for us to figure out the inbetweenie scenarios … where we mix some flash with the available light, and still get good lighting and great exposure.
Now, when we talk about ‘fill-flash’, we’re usually describing the scenario where our ambient exposure is correct, and we’re just lifting the shadows with a mere hint of fill-flash.
So for anyone who wants to know the best fill-flash settings, you have to think in terms of your ambient exposure first and foremost. That is your starting point – correct exposure for the available light. Then you can add flash to it. But just a touch of fill-flash. In other words, “best fill flash settings”, would revolve around your camera settings for correct (or close to correct), ambient exposure. And then adding a touch of flash to even out the shadow areas or lift the contrast.
In this photo, my exposure for the couple was correct. I didn’t allow the brighter street scene or background to influence my camera settings. I based my exposure on the couple. The next step was adding fill-flash with my on-camera speedlight …
Since I shoot in TTL mode most of the times when shooting on the move, I simply dialed down my flash exposure compensation (FEC) to around -2EV or -3EV. Somewhere there. Adjusted to taste.
If I had used manual flash, I would approach it the same way. I’d set my manual flash to give me 2 or 3 stops less exposure than the aperture I am using. If I am shooting at f5.6 then I would set my manual flash to only give me f2.8 or f2 worth of flash exposure.
The fill-flash in this case is coming from the camera’s point of view – but since it is dialed down, it isn’t that noticeable. While off-camera lighting would look better, using on-camera fill-flash like this is definitely a good work-around, especially when we don’t have the means for off-camera lighting.
With this sequence of images in the alley, my camera settings were: 1/400 @ f3.5 @ 800 ISO … and FEC was set to -3 EV. Since I find my Nikon D3 and Nikon SB-900 tends to give more flash than I like as fill-flash, I am constantly dialing it down more. The high shutter speed had two uses here – to make sure I don’t get subject blur as the couple moved and danced there. The other side-effect of the high shutter speed was that I had bumped my flash into high-speed flash sync territory, and that cuts down tremendously on my flash’s output capability. This then helps me pull down the often-times too-strong fill-flash from the D3 and SB-900 combo.
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