High-definition shooting skills of scarlet camera

Lead: High-definition shooting skills of scarlet camera. After my introduction, did you understand some secrets? I hope the article can help you! I hope you like the following model essay!

High definition shooting skills of red scarlet camera 1. Menu operation

A series of parameters (figure 1 1) are displayed above the viewfinder, including frame rate (FPS), ISO (sensitivity), aperture, shutter (exposure) white balance, resolution, image quality (REDcode) and so on. These parameters can be adjusted on the touch screen, and there is a menu icon on the far right of the parameters. Press it to enter the setup menu.

2.FPS frame rate setting

It is used to set the frame rate of image capture for different projects. The range is as follows: 0.5-60fps at 2K, 0.5-48fps at 3K, 0.5-30fps at 4K/4K HD, 0.5- 12fps at 5K, and the default is 24fps. The available frame rate depends on the resolution and REDcode settings. Note that the frame rate setting of Sony PMW-F55 is different from that of Red Machine.

3.ISO sensitivity

Used to adjust the camera ISO. Sensitivity increase or decrease 1/3 steps. Once the ISO is changed, the camera will be recorded in the original image data, and the monitor path will also change. The higher the ISO, the brighter the image in the monitor path, and vice versa. The basic sensitive ISO of red camera is 800, so it is recommended that all shooting should be based on this. The basic ISO recommendation of Sony PMW-F55 camera is 1250.

expose

Choosing the right exposure value quickly can greatly improve the image quality and the efficiency of on-site shooting. Generally speaking, the best exposure means that the image is fully exposed to minimize the noise in the picture, and it is recorded in an environment with sufficient light, but the light should not be too strong to avoid losing details in the highlights, and important highlights may be cut off. By controlling the exposure through the T value of the red camera lens, ND filter and lighting conditions, we can use some tools in the red camera to quickly evaluate whether the main body of the picture has been exposed (Figure 12).

There are three exposure tools built into the camera:

(1) tool 1: histogram

The histogram is located in the lower left corner of the prison. The vertical axis of the histogram represents the number of pixels (relative values) in the brightness position in the image, and the horizontal axis represents the "relative grade" from left to right from dark to bright (Figure 13). The farther to the left, the deeper the shadow. Similarly, the farther to the right, the brighter the highlight.

From the perspective of exposure, when the exposure is accurate, the tone distribution in the histogram is usually just right. For standard scenes dominated by midtones, this usually means that the histogram will? Yamagata in the middle? , down to the sides. If the histogram is stacked on the left or right, the image is usually too dark or too bright.

(2) Tool 2: Door post

In order to let the photographer quickly select the exposure variables in the picture, the red camera has set up gatepost indicators on the leftmost and rightmost side of the histogram (Figure 14).

Unlike the histogram, the gatepost shows the original image data recorded by the red camera, which is not affected by the sensitivity ISO, shutter speed or appearance settings. This design helps the photographer to intuitively understand which parts of the original image data have been cut, and these parts can not be retrieved by the later software. Figure 15 shows the doorposts under different exposure conditions, and the gray bars are doorposts.

(3) Tool 3: Signal lamp

Sometimes, the gatepost cannot provide accurate information about how this part of the image is cut. Therefore, the red camera also has an indicator to indicate the color channel that has been cut (Figure 16). These indicators are displayed as red, green and blue dots for each color channel, usually called? Traffic lights? .

If about 2% of the image pixels of a certain color channel are clipped, the corresponding signal light will light up. For example, when only the red pixels in the skin color are cut (in the image, the face will appear green), in this case, the red signal will light up, prompting the photographer to reduce the illumination of the skin part.

5. Exposure strategy

Mentioned before? Exposure to the right? (ETTR) strategy (which is also recommended by many domestic websites), its principle is to record as much light as possible and restore the image through later stage. To protect dark details, the histogram usually moves a little to the right. Although this method works well in commercial photo photography, it greatly increases the risk of highlight cutting in the picture, because the lighting of film and TV shooting usually has a larger light dynamic range.

The lower the sensitivity, the greater the risk. Therefore, in the process of exposure, we must pay attention to the changes in the doorpost. So it is not necessary to completely follow the principle of recording as much light as possible. We just record more light when necessary to reduce the noise of the picture, not too much. Besides histograms, we should also pay attention to doorposts and signal lights.