ayex Clutch Ring for Macro Photography (Selected Size)
Clutch rings offer a very economical way to take high-quality macro photography. The clutch ring is a threaded ring with two external threads. It is used to screw together opposite lenses on the filter thread. The lenses are thus connected to each other on the front lens. The pre-screwed lens acts like a close-up lens for macro shots.
Note: The pre-screwed lens must not be too heavy. A small wide angle lens is best suited. The entire image area will not be visible with all lenses (the image will vignett).