✔️ For reversed screwing a lens to the camera. As a result, the lens works similar to a magnifying glass ✔️ Super macro shots for little money. Cheap alternative to expensive macro lens ✔️ High-quality workmanship. Allows lower recording dances and higher image scales ✔️ Image scale 1:7 to 1:2.8 ✔️ Filter thread: 49 mm