Feature 1Standard 1.25in interface is compatible for most astronomy telescope. Easy to install and remove. 2High quality aluminum alloy body is sturdy and solid, long service life, not easy to deform or damage. 3The lens adopts fully-coated optical glass to enhance the light transmittance and color reproduction. 4It can provide clear and sharp image and bring scenes in the distance to your front. 5Perfect for observing scenery, bright celestial observations, nebula and so on.SpecificationFeatures: Standard 1.25in interface is compatible for most astronomy telescope. Easy toinstall and remove. High quality aluminum alloy body is sturdy and solid, long service life, not easy to deform or damage. The lens adopts fully-coated optical glass to enhance the light transmittance andcolor reproduction. It can provide clear and sharp image and bring scenes in the distance to yourfront. Perfect for observing scenery, bright celestial observations, nebula and so on. Specification: Condition: 100% Brand New Brand: Datyson Material: Optical Glass + Aluminum Alloy Color: Black Length: Approx. 7.5cm / 2.9in Thread Size: M28 * 0.6mm Interface: 1.25in Focal Length: 40mm Coating: Green Film Weight: Approx. 120g Packing List: 1 * Eyepiece