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What is the classification and function of the grid?

The grid is classified according to the material:

1) Commonly used filter grid: The internal spacer is composed of non-metallic materials, such as non-metallic low-density materials such as wood chips, paper sheets, and plastics;

2) Full metal grid: The internal spacer is made of metal: aluminum sheet. Its high strength and good moisture resistance;

The main role of the grid:

The grid is used to filter out the effects of scattered rays on the film. It should be placed between the human body and the film. Most of the scattered lines can be filtered out, and only a small part of the scattered lines leak. The function of the grid is to improve the quality of the film, filter the scattered lines, reduce the fog and improve the contrast when the thickness and density of the object being photographed are relatively large. It is usually recommended to use a high frequency machine to make film shots, and the effect will be better.


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