What's the difference between a large aperture high shutter and a small aperture low shutter?

Simply put, the depth of field is different.

In the case of constant luminous flux, a large aperture (referring to a large actual opening and a small aperture index) inevitably requires a small shutter speed (high shutter speed). On the contrary, the aperture is small and the speed is slow.

Nowadays, many mobile phone cameras are dual-lens, and they all claim to have a large aperture shooting method. Users really need to know this knowledge.

If the aperture is large, the depth of field of the photos taken will be small. On the contrary, it will be great. Look at this photo, the large aperture can fully blur the background and highlight the theme.

This one below is a small aperture and a slow shutter. Is the depth of field great?

For different situations to be expressed, these two different methods can be used, which will have different effects.

In fact, many shots have depth of field prediction. Look at this vivitar lens.

Look at this arrow. The red dot-4-8-11-16 represents the selected aperture. After focusing, the scales on both sides are the approximate range of depth of field.

The zoom head, because of the different focal lengths, will have different results, and there will be a curve here.