What's the difference between aperture priority and shutter priority?

Technically speaking, aperture priority means that the photographer controls the aperture size, the camera controls the exposure time, and shutter priority means that the photographer controls the exposure time and the camera controls the aperture size.

The following figure can be used to illustrate the relationship between aperture and shutter speed. Simply put, under the same lighting conditions, the larger the aperture, the less exposure time is needed, and the smaller the aperture, the more exposure time is needed.

Meanwhile, the aperture controls the depth of field. When the aperture is large, the depth of field is shallow, which is more suitable for representing sweet pictures such as portraits and flowers. When the aperture is small, the depth of field is large, which is more suitable for showing sharp and clear pictures such as scenery and jewelry.

The following figure shows the performance of large aperture:

The following figure shows the performance of small aperture:

Speed controls the solidification ability of dynamic things. The higher the speed, the higher the solidification force.

High-speed shutter performance taking birds as an example;

Performance of low speed shutter:

Reflected in the creation, aperture priority and shutter priority reflect the creative thinking of the creator.

For example, if creative thinking is based on speed, you can control the style of production by giving priority to speed. For example:

Solidify the thrilling moment with a high-speed shutter;

Or use a low-speed shutter to obtain a smooth water surface:

You can also use a low-speed shutter to get a fantastic trajectory:

And the star orbit:

If the creative thinking is mainly based on aperture, a small aperture can be used to achieve a nuanced effect.

There are also nuanced scenery.

You can also use a large aperture to create a beautiful illusion:

It's like this to shoot flowers and small things-

Taking a photo can easily become a "sugar water tablet".

Summary: Aperture priority and shutter priority are sharp tools for photographers to create, and it is fun to use them properly.