Traditional Culture Encyclopedia - Photography major - What are the modes of P file, S file, M file and A file of card camera? How to apply?

What are the modes of P file, S file, M file and A file of card camera? How to apply?

P file: program exposure.

The camera automatically determines the aperture and shutter according to the ambient light, without human intervention.

S file: shutter priority.

The photographer chooses the shutter speed according to the shooting intention; The camera selects the aperture size according to the ambient light.

M gear: manual:

The photographer chooses the aperture size and shutter speed according to the ambient light and shooting intention.

A gear: aperture is preferred.

The photographer chooses the aperture size according to the shooting intention; The camera selects the shutter speed according to the ambient light.