The sunny 16 rule is the proper exposure is determined by the ISO of the film/sensor setting.
10am-5pm, the shutter speed would be at 1/ISO or 1/100th
With snow/sand the brightness would be a little brighter and the aperture is f/22
LV(Light Value)/EV(Exposure Values)
Equivalent exposures- by balancing the aperture and shutter speed
Different frames have the same amount of light but different aperture and shutter speed shutter speed
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