[Model]: Xing Trang 90 degree full erect image prism
[Size]: Standard 1.25 inch/31.7mm astronomical telescope general accessories
[Coating]: Optical lens, fully coated, high definition
[Applicable]: dual-purpose space and earth, suitable for all astronomical telescopes (31.7mm interface), used for viewing scenery and astronomical observation of the moon surface, planets, nebulae, star clusters, diffuse nebulae and other celestial bodies, high brightness, large field of view, very observation Comfortable; multi-layer coating on the whole surface, high-quality optical performance.