SVBONY Telescopes Eyepieces 1.25" Lens 4mm Multi Coated Telescope Lens for Celestial Nebula Observations 4mm highpower PL eyepiece;provide high power magnification to allow you look more closely and more detailed at the moon's surface and other planet Fully coated blue film optics with all black interior design;no introduction of additional color;highly achromatic;make image more crisp and sharp Wide angle and long eye-relief;more complete view and comfortable observation experience Standard 1.25" diameter with thread;fit for any 1.25" diameter telescope and 1.25" astronomy filters Perfect for broad field lunar observations;medium-sized star clusters;wide range of cloudy nebulasand deep-sky targets