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Therefore, when shooting in macro, it is easy to get a shallow depth of field if utilizing a large aperture. We often make use of the F8, F11, F13 such small, and medium-sized aperture to look at photograph to ensure the photo has clear range. If you use a 100mm macro lens to shoot the insects' close-up, even with the F13 aperture, the depth of field is extremely shallow, and sometimes need to utilize the manual focus function to carefully adjust the focus position to spotlight your eyes of insects to make the image more vivid. 3. Lasts Longer: All there is certainly in the electric motor can be a coil and drive-shaft, as opposed to the a huge selection of moving parts in a traditional combustion engine. As well as being ultra credible the motor will last many years. With less moving parts to think about there exists little that they'll not go wrong.