“Typical indoor ambient light, for instance, might be about 1/60th at 4/f at ISO 400. So If I shoot you in that light, available only, you are going to be properly exposed. You’ll still probably look pretty bad — we nailed the quantity, but the quality of the light is likely ugly as it comes from overhead fixtures.”
“So let’s move from the hypothetical to the practical and do a little exercise in walking the ambient exposure up a little bit to see the effect of various shutter speed on the flash/ambient combo.”
