How to determine the aperture size and shutter speed when shooting in M file?

M file refers to a file on the full manual camera function dial. Generally, digital cameras are called partial manual functions for P, A and S, and M is called full manual function.

In case of the above problems, you can first measure the shutter and aperture on the spot with P-beam and M-beam, assuming that the value is: 1/250 seconds F5.6

1, shooting scenery

When we shoot the scenery, the screen is mostly sky, which may be overexposed at this time. We can reduce the aperture by one or two steps in M, such as 1/250 sec F7. 1 (the larger the value, the smaller the aperture) or1150secf5.6 or 1/200 sec f7.

Step 2 shoot and kill

If you photograph a person, you will find that the light in the back is very strong, which makes the person's face very black. In addition to filling the light with a flash, you can also slow down the speed or increase the aperture value on the M scale, such as1125s F5.6 or1/200s F4.0

This increases the exposure, which can ensure the normal exposure of the characters, but the background may be overexposed, but at this time the characters are the main body. If the contrast is too large, you can choose other methods, such as not using backlight, using reflector, flash and so on.

In practice, you can take more photos to achieve the desired effect. At the beginning, you can compare them on the computer. You can use the software ACDSEE to look at the basic information of the photos and get the exposure value of the photos taken at that time. Only in this way can we evaluate and improve our lens.

In addition, the very important depth of field in the early stage should also be taken into account:

Depth of field is related to aperture size, focal length and distance from the subject. The depth of field is controlled according to the shooting intention. After the composition is completed, the focal length and distance are also determined. At this time, the aperture is mainly adjusted.

1, the larger the aperture, the smaller the depth of field. When shooting people, close-ups and sketches, the larger the aperture, the more important it is, and the smaller the aperture, so as to ensure the clarity of the picture.

2. When shooting with a long focal length, the depth of field is small, so the portrait uses a medium telephoto and the landscape uses a wide angle.

3, close shooting, small depth of field

Here are a few simple formulas suitable for beginners (of course, you can't use these formulas blindly)

Extended data:

M file can be said to be the exposure mode that existed when the camera was born. Within the range of m, the aperture, shutter and sensitivity can be completely controlled. If the whole photo is dark, exposure compensation will be displayed on one side of the negative; If the whole photo is bright, exposure compensation will be displayed on the front; If it is not bright or dark, the exposure compensation will be displayed as 0EV.

In the range of m, you can adjust the aperture, shutter and sensitivity to control the exposure compensation (exposure compensation is the brightness of the photo).

When shooting most subjects, you should refer to the photometry of the camera. After the camera measures light, it will tell the user according to the current aperture, shutter and sensitivity, and what brightness the photos you take like this will be displayed as exposure compensation.

When we first started learning, we often compared them on the computer. We can use the software ACDSEE to check the basic information of the picture and get the exposure value at that time. Only in this way can we evaluate and improve our lens.

Baidu encyclopedia -M file