This nifty red-dot finder easily attaches to the hot-shoe of your camera to assist in positioning your camera on the night-sky. Especially useful with telephoto lenses but also helpful with wide-angle lenses to quickly identify where the camera is pointing - a sometime difficult procedure in the dark. The unit can also be used as a "finder" when attaching a camera to a longer focal length telescope - especially useful if the telescope's bracket is being used for an autoguider.
Adjustable brightness. Uses standard 2032 button battery.