When I was younger I routinely shot at 1/60, sometimes handheld at 1/30 with pleasing results. Now I am 62 and have a bit of hand shake so nothing under 1/125. These two are among the first set from my new D750. In image of couple, the ISO was 320. Shutter speed 1/125 at f/2.0. Flash power was -0.7. Only I had my diffuser on. Simply removing the diffuser should give the results I want. Plenty of keepers before without it on the D7100. From there I can simply adjust the power of the flash directly (i.e. -0.3, +0.7). Thanks for the good info. And happy hunting.