SVBONY 1.25” moon and skylow is a multi-band pass filter transmitting a high percentage of light in the visual spectrum; the filter enhances contrast when observing brighter objects including the moon and planets It also will suppress sky glow from artificial lighting and background glow reflected when the moon is up Mild effect of darkening background of the night sky: So that the fainter objects is more clearly seen contrasted against the blackness of space Effectively filters out stray light: Filtering Selective wavelengths of low-pressure sodium and other man-made sources typically used in street lighting It enhances the views of deep-sky objects by increasing the contrast of these objects against the background sky While nebula filters transmit only a few select wavelengths corresponding to various atomic lines The filter transmits a large portion of the continuous spectrum while blocking a few select lines of the more common man-made light Neodymium provides a unique;selective;blocking feature in that this element greatly reduces glare without reducing important color and brightness variations