Celticbird 2" Telescope Moon Filter, 2" Eyepiece Accessory, Enhancing Effect, Optical Glass, Plastic, Great for Full Moon Observing

2" standard size for Celestron, Orion, Sky-watcher, Meade, William and any brands models. The filter has a mild effect of darkening the background of the night sky so that the fainter objects are more clearly seen contrasted against the blackness of space. It is an eyepiece filter for reducing the brightness of the moon and planets and improving contrast. The filter effectively filters out selective wavelengths of low-pressure sodium and other man-made sources typically used in street lighting. Although it is not a nebula filter, it enhances the views of deep-sky objects by increasing the contrast of these objects against the background sky. Standard filter threads on both sides. So you can mount other filters together when using this filter