Why is it dark for the camera to take pictures at the angle of the light

The situation that LZ says should be backlit.

Backlit photography is a means of photographic light. In a broad sense, backlighting should include two types: full backlight and side backlight. Its basic characteristics are:

From the point of view of the light position, the full backlight is the light shining from the back of the camera from the back of the subject, which is also called "backlight"; The side backlight is the light that shines from the back side of the camera at 135° to the left and right of the camera, and the light receiving surface of the subject accounts for 1 3 and the backlight side accounts for 2 3. From the perspective of light ratio, the subject and the background are in a dark place or 2 3 areas are in a dark place, so the light ratio of light and dark is large and the contrast is strong. From the perspective of light effect, the backlight produces a contour light on opaque objects; Produces transmitted light on transparent or translucent objects; Produces a flashing light on liquids or water surfaces.

If we can use the means of backlight photography properly, it is undoubtedly very valuable to enhance the artistic effect of photographic creation.

In a backlit scene, the character's hair will be more obvious and beautiful, the edges of the body will also be revealed, and the whole character will become more three-dimensional. This is an important reason why many people in the field of photography prefer to shoot against the light.

Taking portrait shooting as an example, the sun (or rays) are behind the portrait, and the light distribution of the whole scene, the face and front of the portrait, will appear relatively dark, which is the so-called backlit shooting.

Most cameras are preset to use all the frames as the basis for metering, due to the backlit environment, the light behind the portrait is relatively strong, and after the average calculation, the camera will think that the dark situation on the front of the portrait is normal, which is the reason why the backlit environment will shoot a big black face.

Solution 1We can use the concept of **compensation to deal with backlit photography, that is, to increase the amount of ** to make the face brighter, but this method will increase the brightness of the whole photo, so not only the face will become brighter, but the background will also become brighter, resulting in the loss of background details.

2.A better way to do this is to use a reflector to reflect the light on the person's face. For example, in the image above, we used a reflector in front of the model to reflect the light on the person's face, as the light came in from behind the model.

It can easily achieve the light of the face, which is a normal ** situation.

Choice of reflectors.

In fact, you can also make your own reflectors, using Styrofoam boards, silver paper, cut and pasted into homemade reflectors.

Backlit photography is a common technique, and proper use of reflectors or other lighting equipment can give the result an unexpected effect.

This is an optical phenomenon that fine-tuning the rate can do.

You can adjust the sensitivity, and the influence of the sensitivity on photography is tabled in two aspects. One is speed, which is easy to understand as a faster shutter speed with higher sensitivity. The second is image quality, the lower the sensitivity, the more delicate the image quality, while the higher the sensitivity, the more noisy. Generally speaking, it is appropriate to maintain the sensitivity below 800.

Adjust the shutter time, the shutter speed is in seconds. Common shutter speeds are: 1 1 2 1 4 1 8 1 15 1 30 1 60 1 125 1 250 1 500 1 1000 1 2000 etc.

The longer the shutter time, the more light will enter, but if the time is too long, the jitter will blur.

Other contents: Leadership attention is the premise of HSE management, and the implementation of the safety production responsibility system is the key to HSE management. From the bidding of a project to the commencement of the project, all parties to the project should make corresponding HSE commitments and establish corresponding HSE responsibilities, and the project owner should always take HSE management as an important task.

In this way, the "safety first" has been formed in the minds of all employees.

1. The concept of "prevention first" makes employees aware of the importance of HSE work and lays a good foundation for future work. Establish integrated HSE management. First, HSE risk management technology and management system are integrated, and scientific and effective management technology is used as the support to ensure the implementation of the corresponding management system; The second is the integration of HSE management and the project development process.

HSE risk exists throughout the construction process of a project, so it is important to focus on comprehensive HSE management throughout the project and improve it as the project progresses, rather than as a phased approach. In order to implement the safety production responsibility system, the Yuji Project Management Department set up an HSE management committee at the beginning of its establishment, and issued management documents such as "Quality and HSE Reward and Punishment Measures", "QHSE Work Arrangement", "QHSE Punishment Implementation Rules", "Safety and Civilized Construction Regulations", etc., requiring all construction units to implement safety.

When taking a photo, you can open the aperture wide, or reduce the shutter speed.

If it's a machine, the only thing you have to do is turn on the flash.

That may be the highest brightness of the background of your camera screen.,That's the case.,The highest is mainly in the sun for fear that you can't see the screen clearly, so it's very bright.,The ** shot will naturally have an error.。。 You're trying to adjust the brightness to the middle.

Vignetting occurs because the angle of incidence of light at the edge of the lens is large, so the loss is also large, so the loss of light occurs, which produces vignetting. When the light is strong, the problem is not obvious, and when the light is not enough, the vignetting will be obvious. This is determined by the optical properties of the lens, which is distorted with the lens.

All the same, it can't be **.

Vignetting is present on either lens, in MTF transmittance.

As you can see from the graph, there is a lot of loss from the center to the edges, especially at wide apertures. It's not a big question to accompany the inspection in the negative film, because the magnifying head also has this problem, which will cancel out part of the impact, of course, if the lens is too indiscriminate and the loss of light is extremely obvious, then it can be seen in **.

The way to take pictures too dark adjusts the reputation early.

The **dark** shot by the camera means that the **deficiency is insufficient, and you can make the **brighter by adding**, the specific method is as follows:

1. Turn on the flash, and the light is used to fill the light.

2. Extend the ** time, night scene photography is especially effective, but the lower shutter speed is easy to shake, and a tripod is required.

3. Choose a larger aperture to increase the luminous flux.

4. Adjust the ** compensation on the camera, adjust the value to the positive direction, and the camera will increase the ** amount on the basis of automatic metering.

5. Set a higher sensitivity, i.e. ISO value.

6. In the later stage, increase the brightness on post-production software such as PS and the Meitu App.

The ** that comes out of the Polaroid will fade.

Over time, any ** will fade, and the polaroid is particularly prominent, which is not helped, it is a collapse determined by its chemical imaging characteristics.

Compared to a general camera, the lens of a primary imaging camera (Polaroid) is no different from the shutter. Its special working principle, the body of the disposable imaging camera with film is also different, in order to transfer and crush the medicine pack, there is a pair of stainless steel rollers on the body, and the positive and negative film bases are crushed through this pair of rollers.

Principle. Compared to a general camera, the lens and shutter of a primary imaging camera (Polaroid) are no different. Its special working principle, the body of the disposable imaging camera with film is also different, in order to transfer and crush the medicine pack, there is a pair of stainless steel rollers on the body, and the positive and negative film bases are crushed through this pair of rollers.

When we use a camera to take pictures, we want to be able to shoot clearly and accurately. ......However, sometimes the ** we shoot will be very dark. ......The reason for this is that the aperture we set when taking photos is too small, the shutter speed is too high, and the metering point is not selected properly.

1. If the aperture is too small, it will cause the amount of light to be non-combustible and black.

When the camera shoots**, light enters the camera through the aperture clear aperture, allowing the image sensor to be sensitive. ......If the shooting time circle is set too small, the light received by the image sensor is insufficient, and the imaging effect will be darkened, and the ** will be blackened. ......Therefore, we need to set the aperture value reasonably according to the light state when taking pictures to ensure that there is enough light intake.

2. If the shutter speed is too fast, it will cause the time to be too short and black.

When the camera shoots, it controls the time through the shutter. ......If the shutter speed is too fast when shooting, it will cause the camera's image sensor to run out of time, the imaging effect will be dark, and the shooting will be black. ......Therefore, we need to set the shutter speed reasonably when shooting, so that the camera photosensitive original can get enough time to image clearly.

3. Improper selection of metering points will lead to inaccurate metering of the camera, **blackening.

When taking photos with the camera, if the metering point we set is not suitable, it may affect the effect. ......For example, when we measure the light part of the picture, the dark part will be indebted, and the ** will be black. ......Therefore, we should set the metering point reasonably to ensure that the overall effect of the picture is normal.

As long as we do the above points, we can shoot **accurate, clear image quality**.