What is the function of M-file of SLR?

Using M-file shooting, you can freely choose the aperture and speed according to the needs of the scene and shooting, and shoot the desired effect. ? The combination of aperture and shutter can be realized more freely and plays an irreplaceable role in the scene with complex light.

After adopting the "manual exposure mode", the aperture size and shutter speed of the camera need to be set manually, and the automatic program in the camera will be completely "on holiday".

Therefore, using this full manual mode requires considerable photographic experience. When taking pictures, the aperture and shutter of the camera should be carefully set one by one according to the lighting conditions at the scene, and sometimes it is necessary to take more pictures. Use the camera's playback function to check the effect, and then make further corrections.

Extended data

Manual exposure depends on these four places: aperture, shutter, sensitivity and exposure indicator. Aperture: controls the amount of light and depth of field. Shutter speed: Set the exposure time. Sensitivity: Set ISO to ensure image quality. Exposure indicator scale: measure whether the exposure is correct.

The biggest advantage of manual mode is that if the composition is changed after metering, the whole picture will not be re-metered like other modes (except exposure locking), and the subject can still shoot the brightness before re-composition. This function of manual exposure mode is very useful for scenes with sharp brightness contrast, backlit portraits, and when you want to make the image brighter (or darker) on purpose.

Baidu Encyclopedia-Manual Exposure