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<blockquote data-quote="yauman" data-source="post: 275318" data-attributes="member: 15418">Just leave the SB700 at TTL mode.Yes, same technique for fill light - but feel free to play with your shutter speed - keeping everything else the same, you'll notice the difference in the lighting of the background.&nbsp; Remember the 1/R^2 law - the light power falls off at the Square of the distance - ie 2x the distance, 4x less power, 3x the distance, 9x less power.&nbsp; So, the background will not be lighted by your speed light and the brightness will be determined by your shutter speed (long exposure = more light etc) but your subject's exposure is determined by your speedlights power. When using speed light, your aperture should always be used to control your DOF and not exposure.btw, here's your picture with graininess fixed - no problem, I shoot at ISO6400 when I shoot events at night where flash is not allowed:[ATTACH]76433[/ATTACH]</blockquote>

[QUOTE="yauman, post: 275318, member: 15418"] Just leave the SB700 at TTL mode. Yes, same technique for fill light - but feel free to play with your shutter speed - keeping everything else the same, you'll notice the difference in the lighting of the background. Remember the 1/R^2 law - the light power falls off at the Square of the distance - ie 2x the distance, 4x less power, 3x the distance, 9x less power. So, the background will not be lighted by your speed light and the brightness will be determined by your shutter speed (long exposure = more light etc) but your subject's exposure is determined by your speedlights power. When using speed light, your aperture should always be used to control your DOF and not exposure. btw, here's your picture with graininess fixed - no problem, I shoot at ISO6400 when I shoot events at night where flash is not allowed: [ATTACH=CONFIG]76433._xfImport[/ATTACH] [/QUOTE]

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