light can bring you a good shape, if you set the f (focal length) correctly, some or many beginner photographers have a problem in choosing the number on aperture, it's easy, all you have to do is believing your eyes, if you had photography session outdoor at day , both of your eyes will be narrow and be small that's the point is, when your eyes opened little same as the largest f-number, and when it's dark your eyes opened huge are the smallest f-number, as i say f-number 1|1.2|1.4|2|2.8|3|4|5.6|8|11|16|the yellow are small number but wider iris diaphragm, the green are large number and it is little diaphragm opened ; )
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