blue-free filter

例句：

1. 1.The blue-free filter in the camerahelps to reduce distortion.
   相机中的无色滤波器有助于减少畸变。
2. 2. The color-free filter in thisproduct is designed for use with smartphones.
   该产品的无色滤波器是为智能手机设计的。
3. 3. The color-free filter in thecamera reduces the amount of light that passesthrough, improving image quality.
   相机中的无色滤波器减少了通过的光量，提高了图像质量。