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Astro-Physics Neodymium (

The Super Contrast Filter for all REFLECTOR and APO-TELESCOPES.

This filter was designed to transmit the maximum amount of incoming light, while suppressing skyglow due to artificial lighting and background glow when the Moon is up. The filter material is a special Neodymium glass that effectively filters out selective wavelengths of low-pressure sodium and other manmade sources. Please note that this is NOT a moon filter, although it will enhance contrast in views of the moon. To dim the moon to a comfortable viewing brightness we recommend a neutral density filter which can be used to greater effect when combined with this Neodymium filter.

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