Learning Knowledge (1) Four modes of exposure: PSAM

2024-06-29 16:49 Company Trend

 

There are three shooting modes: automatic, scene, and P, S, A, and M modes. In automatic and scene modes, the camera controls the shutter speed and aperture. P. The S, A, and M modes are the so-called exposure modes, through which the photographer can choose the exposure factor they want to control - aperture or shutter speed.
 
 
 
Mode P (program automatic)
The camera automatically adjusts the aperture and shutter speed to achieve optimal exposure, but the photographer can choose different combinations of aperture and shutter speed that can produce the same exposure. This is what is called a flexible program.
 
 
 
Mode S (Shutter Priority Auto)
The photographer selects the shutter speed, while the camera automatically adjusts the aperture to achieve optimal exposure.
 
 
 
Mode A (aperture first automatic)
The photographer selects the aperture, and the camera automatically adjusts the shutter speed to achieve optimal exposure. Please note that in the P, S, and A modes, the camera automatically adjusts the exposure for optimal results.
 
 
 
Mode M (manual)
The photographer chose aperture and shutter speed, thus greatly expanding their creative expression space. However, choosing the wrong combination will result in the photo being too bright (overexposed) or too dark (underexposed). Therefore, when selecting aperture and shutter speed, we recommend using the camera exposure indicator as a guide.