Turn your 72mm hood holder lenses into a macro lens. Designed for Nikon F mount and 72mm Hood holder lenses. Works fine with the AF-S NIKKOR 50mm f/1.4G. The focus distance is about 10 cm. The lasts pictures in the gallery are test shots of a pen tip and TV screen.This device is designed for Nikon lenses 72mm hood holder. Print: For filament prints, make sure you do not print skirt as it may affect the F mount shape and forbid proper mount on the camera.