Timeline for Does a fill flash actually help bring out detail?
Current License: CC BY-SA 3.0
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| May 30, 2012 at 21:43 | vote | accept | user | ||
| Jul 28, 2011 at 20:16 | history | edited | ysap | CC BY-SA 3.0 |
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| Jul 28, 2011 at 20:10 | comment | added | ysap | @rfusca, Matt - OK, I see where the possible misunderstanding come from. When I say "dark areas" I mean "dark colored" (say, black or deep gray) as opposed to dark due to lack of lighting. I fully agree that lighting from the side helps bring out the parts that are dark due to lack of lighting. However, if the dark shaded areas have both dark and light colored surfaces, then the additional lighting will not brighten the dark spots w/o possibly overexposing the bright spots. | |
| Jul 28, 2011 at 18:50 | comment | added | rfusca | @ysap Imagine a cube and its lit harshly from the top. The top is light and all the sides are dark. Now you take a flash and flash it from the side. The shadows on the side were reduced and the top was nearly untouched. Because the angle of light is different. (This is basically Matt Grum's example about the midday sun in his answer.) | |
| Jul 28, 2011 at 18:40 | comment | added | Matt Grum | If the flash is on a different axis to the main (as is almost always the case), then the shadows will receive a different amount of light to the highlights, the shadows are shadows because they're pointing away from the main light, vice versa with the highlights. | |
| Jul 28, 2011 at 17:07 | comment | added | ysap | @Matt - see my comment in the other question. How does flash helps in bringing up dark areas of a subject (that is, w/o pulling the bright areas as well) if reflectance is assumed linear? | |
| Jul 28, 2011 at 16:55 | comment | added | Matt Grum | Flash is also commonly used to bring up the shadows of a contrasty object regardless of the background. This technique was especially prevalent in the film days when it was harder to pull up the shadows after a shot had been taken (nowadays there's a fill light slider in Lightroom that makes it very easy, back then you would have to try and dodge each shadow in the darkroom). | |
| Jul 28, 2011 at 16:34 | history | answered | ysap | CC BY-SA 3.0 |