ISO

I'll be honest and say I have no idea what ISO is exactly. I do know that it is a measure of the films/sensors sensitivity to light. The higher the number the more sensitive it is to light, allowing for faster shutter speeds under low light conditions. This boost in sensitivity comes at the cost of increased, grain (film) or noise (digital). Since funiture is pretty stationary, and I can control the light I always use the lowest ISO setting.