Which group of parameters, f16-160 or f8-1250, is more reasonable?

This article is selected from the column, there are more chapters, please pay attention to “Le Xiaoyao photography”, more wonderful content will not be lost! < / P > < p > take landscape photos by hand, assuming that the focal length is 24mm and ISO is 100. Now, we give two groups of aperture and shutter speed parameters, f16-1 / 60 and f8-1 / 250. Which group do you think is more reasonable? < / P > < p > there are four knowledge points involved here: first, the reciprocity of exposure parameters; second, the safe shutter speed to ensure the clarity of photos by hand shooting; third, the relationship between aperture and depth of field; fourth, the relationship between aperture and image quality. < / P > < p > let’s talk about the reciprocity of exposure parameters. The aperture F16 of the first group is two steps smaller than that of the second group, but the shutter speed of the second group of parameters is 1 / 250 s faster than that of the first group by two levels. Therefore, the exposure amount of the two groups of parameters is equal, which is the reciprocity of the exposure parameters. If we increase the ISO of the first set of parameters to 200 and increase the shutter speed by one gear to 1 / 125 second, then the exposure is still the same. < / P > < p > secondly, the safety shutter speed. Hand held safety shutter speed is generally known: the reciprocal of the focal length. But many people may not necessarily pay attention to the safety shutter speed. The safety shutter speed is to increase one gear on the basis of safety shutter speed. For example, if you shoot with a 125mm focal length, the safe shutter speed is 1 / 125 second, and the safe shutter speed is 1 / 250 second. Continue ReadingStraight screen S20! Samsung Galaxy S20 Fe exposure: 1Hz high brush + snapdragon 865