Traditional Culture Encyclopedia - Photography and portraiture - What's the difference between ND filter and medium gray filter (adjustable)?

What's the difference between ND filter and medium gray filter (adjustable)?

There is no difference. ND filter and medium gray filter are the same thing, but they are called differently.

The reducing mirror is also called medium gray density mirror, neutral grey mirror or grey mirror and nd mirror for short. Its main function is to reduce the amount of light entering the camera. The reducing mirror plays a very important role in a good photo.

Domestic subtracter has a great influence on color temperature, but it is cheap and suitable for amateur photographers. However, the influence of imported advanced reducing mirror on color temperature is almost negligible, so it is a more cost-effective choice.

The filtering function of the thinning mirror is non-selective, and the thinning ability of light with different wavelengths is equal and consistent; In other words, the antireflection mirror will not have any influence on the color of the original object, but also can truly reproduce the contrast of the scene (essentially, due to the process, the color temperature will still produce a small amount of deviation).

Extended data:

Suggestions on the use of variable diameter mirrors;

1. Install the cable release.

Because of the long exposure time of the subtracter, it is necessary to install a fast line to shoot and control the shutter with a remote controller to reduce camera shake and damage the picture. For convenience, try to choose a cable release that can set the end time.

2. shoot with a tripod.

Similarly, due to the long exposure time using the subtracter, a tripod must be used to ensure the picture is clear. Before using a tripod, you can take a picture with your hand and roughly determine the composition, then set up a tripod and adjust the composition.

3. Set the exposure mode to manual (M file).

After the camera is repaired, you need to set the shutter and aperture parameters yourself, so you need to adjust the exposure mode to manual.

4. Before adding the subtracter, please focus in autofocus mode.

Due to the addition of 10 step-down lens, it is basically black from the viewfinder, so the autofocus mode (AF) cannot be used. Therefore, before adding the reducing mirror, the focus should be completed first, and then converted to manual focus (MF); The purpose is to lock the focus and not be affected by the subsequent addition and subtraction of mirrors.

5. Set the aperture value between f8~ 1 1.

Subtractor is usually used to shoot scenery. In order to take photos with clear foreground and foreground, the aperture value is generally set between f8- 1 1. If the aperture value is too small, the depth of field will increase and the foreground or foreground will be blurred. If the aperture value is too large, light diffraction will occur and the clarity of the image will be greatly reduced.

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