BAADER Neodymium Moon & Skyglow Filter 2" It also effectively prevents water

It also effectively prevents water stains from remaining and reduces the generation of fog

0Port & ST4 Port

comes with external 3VDC battery pack with power on/off switch

and a third screw locks the eyepiece in position

Weight Capacity: Tested to support 100kg (220 lbs) with no breakage or deformation

BAADER Neodymium Moon & Skyglow Filter 2" It also effectively prevents waterFeatures enhanced 'Phantom' coatings with UV IR cut for even better performance. Intensifies surface details on Mars, Jupiter and Moon and enhances many Deep Sky galaxies and nebulae against the background sky. Features: Selective contrast enhancing filter, especially suitable for reflector telescopes and true Apochromats. Also effective on smaller economy telescopes that cannot benefit from expensive narrow band nebula filters due to the huge light