How much is the digital photography filter?

Make two exposures. According to the relevant public information inquired, digital photography charges 30 yuan, that is to say, the film is exposed twice, each time at the cost of 15 yuan, and the front and side shooting, so it charges 30 yuan. When high-voltage photography irradiates limbs, it will produce scattered rays and radiate in any direction. When the scattered light acts on the film, it will form a background fog on the photo, which will reduce the contrast of the X-ray photo, especially the thick part. The function of line filter is to filter out these scattered lines and improve the contrast of photos.