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p.1 #25 · Ceremony in harsh midday sunlight | |
BrianO wrote:
jofoto photo wrote: fill flash is your friend
The problem with "fill" flash, in harsh light, is that when you add light to the shadows you also usually add light to the highlights, so you gain nothing.
As was said earlier: under expose the ambient, and then use flash as the "main" light, with the ambient as fill.
You're correct that adding "fill" from a light source on or near the camera typically adds to both the highlights and shadows, but not correct in the "gain nothing" argument.
Light increases in an exponential fashion, at least as it is measured by photographic equipment. Each f-stop requires twice the amount of light as the previous stop. For this reason, your fill light may make a greater difference on shadows than highlights. Here's a real world example:
On a sunny day, you may find that the highlights are two stops brighter than the shadows. This means that the highlights are getting 4x the amount of light that the shadows are. Thus, in the beginning, h=4s. If we add enough fill to increase the shadows by a full stop, we're only increasing the highlights by a 1/4 stop (beginning to be practically negligible). (we've moved to 2s for the shadows and 5s for the highlights now, respectively.)
This is not to say that fill-flash is a perfect solution. However, to say that fill flash "gains nothing" is overstating the case.
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