There is nothing to "set." The Zorki and FED models you have do not have built-in light meters, so you need to act as your own light meter - hence the "Sunny 16 Rule."Originally Posted by poorusher
1/500 sec will be fine - it is close enough to 1/400 to make no real difference. The "Sunny 16 Rule" is an approximation that says 1/400 sec shutter speed at f16 is the baseline for exposing 400 speed film in bright sunlight.