I started the series of posts about Nikon Advanced Wireless Lighting (see Nikon CLS Advanced Wireless Lighting, Part I) but quickly realized that there are some interesting aspects of the non-wireless intelligent through-the-lens (i-TTL) system as well.
The i-TTL system typically works like this: immediately before firing the main flash, the flash fires a series of pre-flashes. The reflected light from the scene is detected by the camera. Combined with other information from the camera’s 3D Color Matrix metering system, the camera determines a proper flash output and fires the flash.
Nikon’s i-TTL has two modes: Balanced Fill-Flash mode and Standard mode. The Balanced Fill-Flash mode automatically balances the output of the Nikon Speedlight and the scene’s ambient light while the standard mode ignores the background and tries to bring the scene to a standard level. The standard mode is automatically activated when spot metering is selected. Read More…
