Excuse me, photography students, why is the reduction mirror called ND mirror? What does ND mean? Which English word is the abbreviation?

Neodymium mirror, also called medium gray density mirror, is used to filter light. This filtering function is non-selective, that is to say, the reduction ability of nd mirror to light with different wavelengths is equal and uniform, and it only plays the role of weakening light, and has no influence on the color of the original object, so it can truly reproduce the contrast of the scene.

Basic information

Chinese name

Neodymium mirror

colour

black

Is there a pressure ring?

Non-pressure ring

Is it ultra-thin

Ultrathin mirror ring

catalogue

Main types of 1

2 using skills

3 Other introductions

Fold and edit the main categories of this paragraph.

ND mirror has a variety of densities to choose from, such as ND2, ND4, ND8, ND 16 and ND32 (which need to be exposed once, twice and three times respectively), and can also be used in combination with several medium-sized gray-scale mirrors.

MASSA ND2

Diameter: 46 mm, 49 mm, 52 mm, 55 mm, 58 mm, 62 mm, 67 mm, 72 mm, 77 mm, 82 mm, 86 mm.

Glass material (manufacturer, model): optical glass, high strength.

Total thickness of filter: the lens ring with thread is 5.5mm thick, and the lens ring without thread is 3 mm thick.

MASSA ND2

Please click to enter a picture description.

MASSA ND4

MASSA ND4

Please click to enter a picture description.

MASSA ND8

MASSA ND8

Please click to enter a picture description.

Masand16

Masand16

Please click to enter a picture description.

Masand32

Masand32

Please click to enter a picture description.

Use the tips in this paragraph in folding editing.

The main purpose of using neodymium mirror is to prevent overexposure. If the light is too bright, it is difficult to choose a slower shutter speed. At this time, the ND mirror is used to reduce the light entering the lens, and a slower shutter can be used to shoot. For example, if you need to shoot outdoors in strong sunlight, or if you need to shoot waterfalls with a slow shutter for a long exposure time under normal light conditions to show special effects such as blurred water flow, you need ND mirror.

Fold and edit other introductions in this paragraph.

There is also a special kind called gradient lens, which is a transparent lens with a lower part and gradually transitions to other colors, such as gradient gray, gradient blue, gradient red and so on. It can be divided into gradient mirror and gradient diffusion mirror, and can also be divided into soft gradient and hard gradient in gradient form. "Soft" means a large transition range, and vice versa, it means a small transition range, which should be chosen according to the creative characteristics. The gradient lens is often used in landscape photography, and its purpose is to ensure the normal tone of the lower part of the photo and deliberately make the upper part of the photo reach a certain expected tone.

Gray gradient lens, referred to as GND lens for short, is widely used in gradient lenses, which transmits half light, blocks half light and blocks some light from entering the lens. It is mainly used to obtain the correct exposure combination allowed by the camera under the conditions of shallow depth of field photography, low-speed photography and strong light, and is also often used to balance tones. GND mirror is used to balance the contrast of the upper and lower or left and right parts of the picture, and is often used to reduce the brightness of the sky and the contrast between the sky and the ground. It can effectively darken the brightness of the upper sky, soften the transition between light and dark, and effectively highlight the texture of clouds while ensuring the normal exposure of the lower part. GND mirrors have different models and different grayscales. From dark gray to colorless. Usually, the contrast of the picture is measured before deciding to use it. Expose according to the photometric value of colorless part, and make some corrections if necessary.

As for the color gradient mirror, there is a sunset mirror which is widely used. It is a transition from dark orange to light orange, which is used to enhance or create the sunset effect and express the dusk atmosphere in the shooting scene.

When shooting, if the light is too strong, we have to narrow the aperture, but this leads to the failure to obtain the necessary exposure combination. If the ND mirror is used at this time, this problem can be solved. It can only reduce the amount of light passing through the lens and has no effect on the color tone. On the surface, the hue of this color filter is gradually changing from gray to black. The larger the number, the stronger the ability to reduce luminous flux. In addition, when there is a strong light brightness contrast in the picture, GND mirror can be used to obtain the balance of picture exposure.