How to set parameters manually for mobile photography

Lead: I am fascinated by lumia's professional shooting function. In my opinion, only a camera with adjustable parameters is a good camera. Phenomenon Most mobile phones have professional shooting function. Next, I will talk to you about how to manually set the parameters for mobile phone photography.

How to set parameters manually in mobile phone photography is an intuitive art, but this intuition is not innate. To cultivate this intuition, we must first understand the most basic knowledge of the camera: exposure. No matter how simple or complex the camera is, it must have exposure settings. The exposure setting directly determines the brightness of the photo. This setting is mainly determined by three factors: aperture size, ISO level and shutter speed.

Exposure triangle: aperture, shutter, ISO sensitivity.

Aperture: Controls the amount of light entering the camera.

Shutter: controls the time when light enters the camera.

ISO sensitivity: controls the camera's sensitivity to light.

People can achieve the same exposure through different combinations of the above three settings. But the most important thing is to know how to choose. Because every setting will affect the properties of the photos you take.

Shutter speed

When the shutter is opened, the camera's sensor will be exposed. So-called? Shutter speed? It actually represents the length of time that light is allowed to enter the camera. ? Shutter speed? And then what? Exposure time? Actually, they all refer to the same thing. The faster the shutter, the shorter the exposure time.

Numerically, the shutter speed is the simplest of the exposure triangles: it is directly related to the amount of light entering the camera. For example, when the exposure time is doubled, the amount of light entering the camera is also doubled. The possibility of setting a shutter for photos is also the highest among the three numbers:

Typical example of shutter speed

1-30+ seconds use a tripod to shoot at night or in dim light.

2? 1/2 seconds wants to turn running water into silk. In order to enhance the depth of field, take a landscape photo with a tripod.

1/2? 1/30 seconds blurs the background of the moving lens, and the hand is fixed.

1/50? 1100 seconds when zoom is not used.

1/250? 1/500 seconds

Solidify daily movements, such as athletes running.

1/ 1000? 1/4000 seconds to shoot high-speed action at close range.

Shutter is a powerful tool that allows you to freeze or exaggerate the dynamic appearance:

? Slow shutter, high shutter

The most common use of slow shutter is to blur waterfalls or shoot night scenes. In general, we don't often use a slow shutter to avoid hand shake (because the slower the shutter, the more your hand will shake. The camera and shutter will also shake together, and the photos taken will be blurred. Reasonable use of shutter can add a little creativity to photos. For example, on the right of the picture above, a water polo is bursting. The photographer used a high-speed shutter to capture the moment when the water polo burst in a few hundredths of a second.

aperture size

Take a bucket full of rain as an example. Big aperture? Is it a wide fight? Fine aperture? It's a narrow bucket. The aperture of the camera is like a first-class gate, which is responsible for controlling the luminous flux entering your camera lens. Aperture is calculated by f value, which is sometimes confusing. Because the aperture is large and thin, it is inversely proportional to the amount of light flowing into the camera. The larger the aperture, the smaller the f value. If your friend asks you to reduce the aperture when taking pictures, it also asks you to increase the F value of the camera (remember the other way around! )

aperture size

Numerically speaking, every half of the aperture value decreases, the light absorption area in the camera increases by four times. There is an equation to calculate this, but most photographers will only remember the F value of doubling/halving.

Shutter setting relative metering shutter speed

F/22 1X 16 seconds

F/ 16 2X 8 seconds

F/ 1 1 4X 4 seconds

F/8.0 8X 2 seconds

F/5.6 16X 1 sec

F/4.0 32x1/2s

F/2.8 64x1/4s

F/2.0 128X 1/8 seconds

F/1.4 256x115 seconds

The aperture number and shutter combination above all show the same exposure. The f value in the above picture is the standard aperture value of all cameras. Of course, some cameras allow you to make finer adjustments, such as f/3.2 or f/6.3.

Large aperture, small aperture

F/2.4 low aperture value, shallow depth of field and fine aperture, f/ 16 high aperture value and deep depth of field.

F 1.8 Pay attention to the green chess piece at the back, the hole on the flag board and the white cloth at the upper right.

F4 gradually narrows the aperture, and the field of vision becomes clear.

F22 Turn the aperture to the thinnest, and the background at the back will be clear. This is the depth of field.

International Organization for Standardization (ISO)

ISO determines the sensitivity of the camera to incident light. This is similar to the shutter speed. As the number increases, the exposure increases or decreases to the ratio of 1: 1. However, unlike the aperture and shutter speed, for photographers, the lower the ISO, the better, because the higher the ISO, the greater the noise of photos. So photographers usually improve ISO only when the aperture and shutter don't absorb enough light, such as in dark or extreme darkness.

Low ISO, high ISO

Common ISO settings include 100, 200, 400 and 800, but many cameras allow lower or higher ISO values. As far as small DC is concerned, when ISO is set at 50-200, the noise generated by the camera is generally acceptable (that is, the image quality is imperceptible to the naked eye). For digital cameras, the range of 50-800 cameras is acceptable.

Tips: In the final analysis, if the aperture, shutter and ISO are adjusted to a balance point, the exposure will be relatively accurate. In other words, while we want to get proper exposure, we should also consider these points, change the most everyday language, that is, avoid hand shake, make the scene clear enough, and choose the image quality at the same time? Hey, so annoying? Actually, it's not. Practice a few more times, and you will get used to it soon.