Special feature: 16mm long eye relief, folding down eyecup, FMC green coating, 66-degree wide angle, 1.25-inch eyepiece barrel Material: Metal Eye relief: 16mm Lens coating: Fully Multi-Coated Water resistance: Waterproof Focus type: Fixed focus Magnification: 8x Compatibility: 6mm eyepiece, 1.25 inches, compatible with most telescopes and Barlow lenses; threaded design allows connection with filters 66-degree apparent field of view enables quick and precise target acquisition; 6mm focal length ideal for observing lunar surface details, planetary features, and double stars Crisp image quality: Fully Multi-Coated green film maximizes light transmission; 5-element, 3-group optical design delivers sharp images with excellent color correction and contrast Comfortable viewing experience: 16mm eye relief allows close eye placement without interference from eyelashes, suitable for eyeglass wearers Precision design: Blackened lens edges and internally blackened aluminum 1.25-inch barrel reduce internal reflections and enhance image clarity