Shutter speed, aperture, white balance and ISO

Sensitivity (ISO) reflects the sensitivity of the film/photosensitive element of the camera to light. ISO is a member of the exposure triangle. Its value determines the sensitivity of the camera to light. The higher the value, the more sensitive the camera is to light, that is, a high ISO allows the camera to shoot brighter works with the same shutter aperture setting. However, using ISO also has side effects. High ISO can bring higher stability and sensitivity, but it will also reduce the imaging quality and greatly increase the noise of the picture. Therefore, in the case of high quality requirements, photographers will try to shoot with low ISO.

Shutter is a device for controlling exposure time in camera.

In those years when photography was just invented, it usually took several minutes to take a photo. Most cameras don't need a shutter. At the beginning of exposure, take off the lens cover, then look at the watch. After five minutes, cover it and the photo will be finished. Later, the photographic speed of film became faster and faster (ISO became higher and higher), and the exposure time became one minute, several seconds,110 second or even one hundredth of a second. It's not fast enough to hold the lens cover by hand at this time. We need something that can accurately control the exposure time, and this thing is the shutter. Shutters include mechanical shutter, electronic shutter and electromechanical combination shutter.

If you want to shoot fast-moving objects, you need a faster shutter speed. Like waves,

Portrait photography does not require too fast shutter speed.

For natural scenery, you can slow down the shutter speed and use a tripod to get better exposure.

The white balance is set to shoot the correct hue. Color temperature literally means "the temperature of color". The temperature is cold and warm. What is cold and warm light? We call these colors red, yellow and brown "warm colors" and cyan, blue and green "cool colors". The unit of color temperature is "K value", and "K" is "Kelvin" (absolute temperature), which is the unit for measuring color temperature. The lower the color temperature value, the more inclined to red (warmer), and the higher the value, the more inclined to blue (colder).

The following are some common color temperature examples:

16000-20000K: The sky is blue.

8000K: foggy weather

6500K: cloudy weather

6000K: cloudy weather

5500K: ordinary sunlight, electronic flash.

5200K: brilliant noon sunshine

5000K: daylight is the most commonly used standard for professional light boxes for photography, art and other purposes.

3200K: fluorescent lamp

2800K: tungsten lamp/light bulb (daily household light bulb)

1800K: candlelight

1600K: sunrise and sunset

The basic principle of setting white balance is as follows:

Aperture is a device to adjust the size of the lens entrance hole.

Common aperture values are as follows: F 1, F 1.4, F2, F2.8, F4, F5.6, F8, f1,F 16, F22, F32, F44. F 1 max. Large aperture blur effect is good.

What is the sensitivity ISO that a novice photographer must learn?

What is ISO? What does camera ISO mean?

white balance

How to understand the concepts of ISO, shutter, aperture and exposure?