Tuesday, April 17, 2012

Two Remote Flashes Photography

This photo was taken using one SB-800 flash on the subject's upper left side and one SB-910 on the upper right side with D700 and 105mm/2.8 VR Micro lens.  Both flash unites had diffusion dome mounted on the flash head which pointed upward toward the ceiling.  SB-800 was set at "REMOTE", Channel 1, Group B; SB-9210 was set at "REMOTE", Channel 1, Group A.  The flash on the D700 was set at Commander mode (Custom Setting Menu: e3).  Built-in flash: "--" (Mode); Gorup A: TTL (Mode), -3 (Comp.); Group B: TTL (Mode), 0 (Comp.).

The camera exposure mode was set at Manual: ISO 640, 1/250s - f/3, -1.0EV.  Since the output of both flashes were controlled automatically using iTTL.  It was way too confusing to use automatic exposure for the camera also.  When using the iTTL flash, the camera is almost always set at manual.

Setting the Built-in flash Mode at "--" let the Built-in flash only used as a trigger for the other two remote flashes.  But in reality, the amount of light coming out from the Built-in flash can still influence the lighting.  Nikon makes a small gadget SG-31R that blocked the white light from the Built-in flash completely and only let the infrared light out to trigger the remote flashes.  A nice gadget to have, should buy it next time when I will be in the US.

I can see all three flashes worked as they reflected as three spots on each of the two round balls.  The left side flash is brighter than the right side flash.  The built-in flash that used to trigger the two remote flashes can also be seen.   I removed the three spots on each of ball using Photoshop.  An umbrella for each of the flash should solve the problem.  Over all, a nice exercise!

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