Applicable models:For Sigma original Sigma 10-20 lens
【feature of product】
The hood can be installed in reverse for easy carrying and storage. After the hood is installed, you can also install a UV lens and lens cover to block the side interference light source, reduce halo and enhance the color and saturation of the photo
【Hood function】:
The hood is a device that is attached to the front end of the lens of film cameras, digital cameras, and video cameras to block harmful light. Jinhui The inner wall of the hood has undergone multiple matting treatments. The reflectivity of the inner wall is only about 10%, and it will not refract the lens during use. Using the hood can play a positive role in suppressing the picture halo, preventing stray light from entering the lens, blocking rain and snow splashing, etc., and can give full play to the potential quality of the lens optics! The hoods available on the market now adapt to all connection systems, thus giving consumers the option of not having to use original accessories. We have developed the universal connection method of top-tight bayonet structure and screw-type screw structure based on ISO standard, and use lock nut and lock ring respectively.
1. It can prevent the entry of non-imaging light and avoid fog when shooting in backlight, side light or flash photography.
2. It can prevent the scattered light from entering the lens when taking photos with forward and side light.
3. In lighting photography or night photography, it can prevent the surrounding interference light from entering the lens.
4. It can prevent accidental damage to the lens, and it can also prevent fingers from touching the surface of the lens by mistake. It can also shield the lens from wind, sand, rain and snow to some extent.
There are many sizes of hoods, and the one that matches the focal length of the lens should be selected. The shorter the focal length of the lens, the larger the angle of view and the shorter the hood. If the hood of a standard lens is used on a wide-angle lens, it will inevitably produce the consequence that the image around the screen cannot be imaged. On the contrary, it cannot play the role of shading. When using a zoom lens, it is best to be equipped with a self-use retractable lens hood.
Lens hoods are widely used in backlight photography, generally speaking, to avoid glare. However, if the light source is close, glare may still occur. At this time, you can use your hand to block the light shield on the side where the light source is located. Minimize the influence of light source on imaging. Whether the glare is eliminated, you must observe it clearly in the viewfinder.
【Principle of hood】:
The hood is a device that is attached to the front end of the lens of film cameras, digital cameras, and video cameras to block harmful light. The hood is an indispensable accessory for the visible light lens! The hood has a cylindrical shape, a rectangular shape, a petal shape, and so on.
Strictly speaking, the hood is an integral part of the lens optical system. A lens is composed of several or more than ten lenses. And every lens has two reflective surfaces, and a lens has dozens of reflective surfaces! The more reflective surfaces, the greater the impact on the lens imaging! Especially when shooting in backlight or side backlight, multiple reflective surfaces will interfere with each other to form a halo. Halo makes the picture dim(Color desaturation)Or flares appear. Sometimes the shots appear to be misty, in fact this is caused by the unused lens hood, rather than the quality of the lens.
The inner wall of the high-quality hood is processed with multiple matting. The reflectivity of the inner wall is only about 10%, and it will not refract the lens during use. The use of a lens hood has a good effect and effect on suppressing image halos, preventing stray light from entering the lens, blocking rain and snow splashing, protecting the camera and lens from accidental collisions, and giving full play to the potential optical qualities of the lens.
When shooting outdoors, you should use the hood as much as possible, which is very beneficial to improve the quality of shooting. We did a set of experiments under the same test conditions (backlight measurement, distant view). Shoot the two groups with and without the hood. Among them, the picture quality of a group of pictures using the hood is much higher than that of a group of pictures not using the hood! The performance is: the halo of the sky in the upper right corner of a group of pictures using the hood disappears, and the color saturation and clarity of the picture are obviously improved...
Using a hood is not only a means to improve the quality of the picture, but also a good professional habit, but also an expression of the professionalism of a rigorous photographer!