1, shooting mode
You only need to know six shooting modes, and the learning order is automatic → program automatic P file → aperture priority → shutter priority → manual exposure M file →B door.
(1) In the automatic mode, we just need to take a picture, make a composition, and then press the shutter. The light is automatically determined by the camera, similar to shooting with a mobile phone, suitable for novices.
(2) Automatic program P, which can adjust the exposure compensation to change the brightness of the picture, and can also set ISO, white balance and other parameters, which is more operable than the full-automatic mode.
(3) Aperture priority mode: manually set the aperture and adjust the aperture parameters according to the depth of field. ISO and shutter speed are automatic, which is more operable than P-file, and it is also a shooting mode that many people like.
(4) Shutter priority mode, similar to aperture priority, gives priority to setting shutter speed, and the aperture and ISO are automatically adjusted, which is suitable for shooting sports subjects and is more operable than P file.
2. Hole
Aperture has two main effects on photos: exposure and depth of field, which need to be adjusted frequently. The aperture is represented by f, and the aperture is equal to the focal length ÷ equivalent aperture size, such as F4. When the focal length is 50mm, the equivalent aperture size of the lens is equal to 50 mm ÷ 4 =12.5 mm; When the aperture becomes F2, the aperture size is =50mm÷2=25mm, so the aperture value is small, and the larger the aperture, the more light enters, so the larger the aperture, the more exposure.
Aperture has a great influence on depth of field. The larger the aperture, the shallower the depth of field, so the background is blurred, which is suitable for taking portraits. On the contrary, the smaller the aperture, the greater the depth of field and the clearer the background, which is suitable for shooting scenery.
3. Shutter speed
Shutter speed is the exposure time. The faster the shutter speed, the shorter the exposure time and the less exposure. At the same time, the high-speed shutter can capture the moment of movement, such as shooting birds; The slower the shutter speed, the longer the exposure time and the more exposures. You can record the trajectory of the light spot to express the movement, such as the trajectory of a car. Shutter speed and aperture are parameters that need to be adjusted every time.
4. Sensitivity
ISO is a measure of the sensitivity of photosensitive elements. The higher the ISO, the more light is sensed, but it will produce noise. The lower the ISO, the less light is sensed, and the better the image quality. Low ISO, such as 100, is often used to ensure image quality.
Step 5 focus
Focusing, through the focusing mechanism, the focus image is clear. Manual focusing is to focus by adjusting the focus ring, which is slow to operate, but the focusing accuracy is the most accurate, and manual focusing is not needed in the early stage. So to use autofocus, autofocus has three modes:
Focus AF-S once, press the shutter for half a time and hear a beep to indicate that the focus is successful, and then press the shutter to shoot, which is suitable for still life shooting.
Servo focusing AF-C is suitable for shooting moving subjects. Half-press the shutter to complete the focus, and the focus will move with the movement of the subject, and then press the shutter to shoot.
Smart focus AF-A, choose AF-S or AF-C according to whether the subject is moving, which is smarter.