Mobile phone photography -2. Preliminary knowledge of mobile phone photography

1. Underexposure: insufficient light, characterized by black.

2. overexposure: the light enters CMOS, so that no details overflow and appear pale.

The photos taken by 1. are blurred, which can be stabilized by increasing the shutter speed or equipment.

1. Open source: provide light source, and find or make enough light.

2. Throttle: Fix the mobile phone with a tripod, manually set the shutter time to extend and decrease ISO.

1. The mobile phone will be exposed by the brightness of the point we choose.

1. When the focus of the mobile phone is in a dark place, the mobile phone will automatically adjust to increase the exposure, which will lead to underexposure in the bright place, and vice versa.

2. Direction of light: forward, backward and sideways.

(1) Side light: The object has both bright and dark parts, and looks stereoscopic (from the contrast between dark parts and highlights).

(2) Smooth light and shadow: along the line of sight, the details of the picture can be shown in detail, but without shadows, it will look dull and lack of three-dimensional sense.

(3) Backlight: The direction of light is relative to the eyes, and people often have silhouettes, that is, unclear and dark. Backlight can easily lead to overexposure, resulting in missing details. If the picture is overexposed, it will feel like sunshine.

3. Soft light and strong light

(1) Soft light: It looks very soft.

(2) Strong light: It looks sharp.

4. Temperature of light

(1) We should make proper use of the temperature difference of light to create a cold and warm contrast environment to add aesthetic feeling to the picture and provide different emotions and atmosphere.

1. Composition: Under the control of perspective rule, the elements in the picture are presented and arranged within the limit of lens focal length.

2. The basic principles of composition

(1) golden section point-the golden section point of the subject in the picture.

(2) Trigonometry-When shooting unobtrusive items, such as cities and landscapes. The picture is full of vitality.

(3) Symmetrical composition-it is suitable when you want to highlight the solemnity and solemnity of objects and the grandeur of architecture. The picture gives people the feeling of being closed, steady and solemn.

(4) Triangular composition-showing the primary and secondary relationship between subject and companion, giving people a sense of stability.

(5) Guide line-enhance the sense of space, giving people the feeling of being near the big and far from the small, with spatial depth.

(6) Composition of the front, middle and back scenes-There are three scenes in the picture, which are often used to take landscape photos.

(7) Repetition and rhythm-there are repeated or similar objects in the picture, even with rhythm and regularity.

(8) Contrast and analogy-rhythm is also a kind of analogy, that is, repetition of the same thing can bring people a sense of visual pleasure;

Contrast means that different things form a sense of opposition or contradiction in the picture, with contrast or inversion and different color temperatures.