What is true of extension tubes?

Extension tubes are used in Photography to increase the distance between the camera body and the lens, allowing for closer focusing and macro photography. They do not contain any optical elements, which means they maintain image quality while reducing the lens's minimum focusing distance. However, using extension tubes can also lead to a reduction in light, requiring adjustments to exposure settings. They are compatible with most lenses and can be used in various combinations to achieve different levels of magnification.