When using a flash gun, my camera settings were set to 1/1250 of a second, with an aperture of 2.8 and an ISO of 200. there is a black line down my first photograph as I am using too fast of a shutter speed. The focal plane shutters, this is where the shutter speed is determined by the size of the gap between the first and second shutter curtains as they sweep across the sensor. The flash is faster than the shutter speed, so when the shutter speed is higher or goes over the maximum sync speed this creates a black bar in the photograph.
In the second photograph I correctly exposed the image by adjusting the shutter speed, lowering it to accommodate the sync speed. as well as lowering the ISO 125 as the flash over exposes the image, lowering the ISO reduces the grain as well as reduces the light. To avoid really harsh light, I aimed the flash gun at the ceiling which dropped down onto the subjects face giving a soft tonal effect.
Subject and Sequence 17076811 