I would really appreciate it if somebody could put me in the picture regarding balancing the light using indoor flash directed at the subject and not bounced of a wall or coloured ceiling. I have a Lastolite 18% grey card which completely fills my frame on my Nikon D800 which is great for indoor shots using ambient light but if I am using my Nikon Speedlight do I still need to use the grey card or am I just as well setting my cameras internal white balance setting to flash and leaving it to the camera to correct the proper colour balance.
I would really appreciate any help on this matter as I am a bit confused which is the best option.
Kind regards
Gary