Use of Neodymium Reduction Mirror

Subtractor is a kind of grey mirror, which reduces the amount of light entering the camera. Generally, we increase the exposure time by low iso or small aperture. However, too small aperture will reduce the image quality (for example, f22), and the lowest iso (for example, iso 100) is generally used for scenery shooting.

So what if we want to increase the exposure time? You need a mirror to help. For example, when shooting water flow and lake surface, we hope to shoot cotton-wool water flow through long exposure, which is a kind of softness that many photographers want to try. At this time, you need to use nd mirror.

Reducing the mirror can bring more exposure means to your creation, turn day into night and give full play to the creative space; Many times, due to the intensity of external light, we can't get enough shutter time, so we can't realize our photography intention. For example, when shooting water in the wild, we hope to use the shutter of 1 s to make the water flow look as soft as cotton wool.

When the light is strong, according to my shooting experience, the aperture is f 16, the sensitivity is iso 100, and the shutter speed is still around 1/30 seconds. So we need a reducing mirror to reduce the shutter speed. Deceleration mirrors are divided into gear positions, and commonly used ones are nd8 and nd64. Here, 8 and 64 represent some powers of 2. For example, 8 is the third power of 2, which means reducing the exposure by three steps (from 1/800s to1100s). 64 is the sixth power of 2, which means lowering the shutter by six levels (from 1/800s to113s). Personally, I suggest that it is best to buy a reducing mirror that is lowered by 6 or even 10, so that the shutter can be lowered to a very low level.

We usually use neodymium mirrors to photograph flowing clouds or water.

The composition is based on the traditional photographic composition principle, that is, the three-point principle, taking the sea level as the reference, and paying special attention to the level. Due to people's habit of looking at the sea, the inclined sea level will interfere with the balance of the cerebellum and make people uncomfortable. As for whether the sea level is one-third or two-thirds, it depends on the specific situation. For example, if you want to highlight the prospects, you can make the prospects account for two-thirds. When there is a perfect sunset or sunrise reflection, you can break the conventional composition. Shooting the sea is special, that is, the prospect of the sea is the same everywhere, so the prospect becomes very important. If you have a good prospect, you will win half the battle. Coupled with the cooperation of weather and clouds, it must be a wonderful movie.