Use the skill of reducing the mirror to teach you to take good-looking photos.

1. Correctly controlling exposure and loading different subtractors will have different effects on the amount of light entering the lens. You need to complete the corresponding calculation before installing the lens, "how much nd matches how much shutter speed".

2, exposure should be right, novices who have just come into contact with photography will always hear a sentence: "I would rather not be exposed", to the effect that I would rather be underexposed than overexposed, because some details of underexposed can be found back later, and the overexposed part can't. For long exposure, when calculating the exposure value and the corresponding shutter speed, we can try to reduce the shutter speed, "expose to the right" and adjust the brightness later.

3. Generally speaking, the slower the moving object is, the longer the exposure time is needed to capture the feeling of "flowing"; For the same object, the longer the exposure time, the more obvious the sense of flow.