Do you need a hood to shoot night scenes with SLR?

A hood must be installed, which can protect the lens, prevent the front end of the lens from being damaged by collision, and prevent fingers from accidentally touching the lens and leaving fingerprints that are difficult to remove.

Backlight photography widely uses a hood, which can generally avoid glare. However, if the light source is close, glare may still appear. At this time, you can block the hood by hand at the side where the light source is located, and whether to eliminate glare can directly observe the effect in the viewfinder.

UV mirror is mainly used to prevent ultraviolet rays, which is no longer necessary in the digital age. It only protects the lens and prevents dust from falling when touched.

Shooting the night scene with a UV mirror may produce "ghost", which is the reflection of ultraviolet rays after refraction, instead of using a hood.

Extended data

use

1, when shooting outdoors, try to use a hood, which is very beneficial to improve the shooting quality. A group of experiments were carried out under the same test conditions (side backlight, foreground). Shoot two groups with and without hoods.

2. Among them, the picture quality of a group of pictures with a hood is much better than that of a group of pictures without a hood! The halo in the upper right corner of a group of pictures using a hood disappears, and the color saturation and clarity of the pictures are obviously improved.

3. The function of the hood is to prevent stray light from entering the lens, thus eliminating fog and improving the clarity and color reproduction of imaging. Its main uses are as follows:

(1) When shooting with backlight, side light or flash, it can prevent non-imaging light from entering and avoid fogging;

(2) When taking photos with forward light and side light, it can prevent the surrounding scattered light from entering the lens;

(3) In lighting photography or night photography, it can prevent the surrounding interference light from entering the lens;

(4) The hood can also prevent accidental damage to the lens, prevent fingers from touching the lens surface by mistake, and shield the lens from wind, sand, rain and snow to some extent.

4. Besides the optical quality of the lens itself, the function of the hood is also very obvious. The picture without hood is not ideal in color, sharpness and contrast, but the picture with hood has good performance in these aspects. The hood is small and the effect is different.

5. Using a hood is not only a means to improve the image quality, but also a good professional habit, and it is also a manifestation of a rigorous photographer's professionalism!

Matters needing attention

1, the hood has many sizes, so you should choose the one that matches the focal length of the lens. Be sure to confirm the size before buying or bring a camera directly to match!

2. It should also be noted that the shorter the focal length of the lens, the larger the viewing angle and the shorter the hood. If you use the hood of a standard lens on a wide-angle lens, it will inevitably lead to the result that the image around the screen cannot be imaged. On the other hand, it can't play the role of hood. When using a zoom lens, it is best to use a retractable hood.

3. The hood is widely used in backlight photography, which can generally avoid glare. However, if the light source is close, glare may still appear. At this time, you can cover the range hood with your hand on the side where the light source is located. Whether the glare is eliminated or not should be observed clearly from the viewfinder.

4. When using the hood, we should consider the factors that it works with the flash, because sometimes the former often blocks part of the light of the flash.

5. The hood is used to reduce the glare interference of the lens caused by stray light outside the shooting area, so it can only be used on the lens with the front end not rotating when focusing. Generally speaking, the longer the hood, the better the effect of blocking stray light. But if the flat cover is too long, it will block the four corners of the picture.

6. The position of the petal cover corresponding to the four corners of the picture is concave inward, which can "get out of the way" the light at the four corners of the picture. On the premise of not blocking the four corners of the picture, the petals of the petal cover extend forward by a light shield, which can provide better blocking effect than the round-mouth light shield.

References:

Baidu encyclopedia -hood