How to set parameters when shooting backlight with SLR camera?

1. indoors and outdoors, whether it is sunlight or lighting, it is recommended to flash against the light. This is the most important way to take a clear picture of the face. As for the light, the parameters are set according to the environment, depending on the situation.

2. The indoor light is poor, and the visible light outside the window is bright. At this time, it is a large aperture low flicker compensation flash.

3. Try to set the ISO value as low as possible outdoors. The lower, the better. Some cameras can be as low as 80, while others only have ISO 100, and then achieve the face-trimming effect of Zhong Da flash. Some cameras have a maximum aperture of 1.8, while others have only 2.8.

4. The indoor flashing soft mask is also very easy to use.

5. Outdoor, depending on the situation, the backlight should not be too strong, and a large flash and a soft mask can also be used, otherwise it is a large flash and small aperture mode.

principle of operation

SLR digital camera refers to a single-lens reflex digital camera, that is, DSLR(Digital Single Lens Reflex).

In this system, after the light reaches the mirror through the lens, it is refracted to the focusing screen above to form an image. Through the eyepiece and pentaprism, we can see the scenery outside in the observation window. In contrast, ordinary digital cameras can only see the captured images through the LCD screen or electronic viewfinder (EVF). Obviously, the directly seen image is more conducive to shooting than the processed image.

When shooting in DSLR, press the shutter button, the reflector will pop up, and the shutter curtain in front of the photosensitive element (CCD or CMOS) will be opened at the same time, and the light passing through the lens will be projected onto the photosensitive original, and then the rear reflector will be restored immediately, and the image can be seen in the viewfinder.

This structure of the single-lens reflex camera ensures that it is shot through the lens, so that the image seen in the viewfinder is always consistent with the image on the film, and its framing range is basically consistent with the actual shooting range, which is very conducive to intuitive framing and composition.

In addition, a major feature of SLR digital cameras is that they can change lenses of different specifications, which is an inherent advantage of SLR cameras and incomparable to ordinary digital cameras.

In addition, the positioning of SLR digital cameras in digital cameras is now a high-end product, so the area of SLR digital cameras is much larger than that of ordinary digital cameras in terms of the area of photosensitive elements (CCD or CMOS) related to the photographic quality of digital cameras, which makes the photosensitive area of each pixel of SLR digital cameras much larger than that of ordinary digital cameras, so each pixel can show more detailed brightness and color range, which makes the photographic quality of SLR digital cameras significantly higher than that of ordinary digital cameras.