Nikon D Review Next go into the Group flash options menu, which is where you set the mode and power called Comp for compensation for each group. Under Mode you have 3 options; TTL — where the flash power is set automatically based on your camera settings and subject distance, A — Nikon Wireless Camera Setup Aperture for non-TTL flash to set the power output based on subject distance and exposure settings, and M — manual to set the flash[…]
