1.25inch Optical Collimation Eyepiece designed for precise alignment of telescope optics, helping you achieve sharp stars and accurate framing in both observing and astrophotography. Allmetal construction (aluminum alloy) in black ensures durability and long life. The threaded design provides a secure, wobble fit, while its compact size makes it easy to carry and store. Built for astronomy enthusiasts and professionals alike. Suitable for beginners and experienced stargazers who need reliable, repeatable collimation results. Fits standard 1.25inch telescope fittings and accessories, offering straightforward compatibility with common focusers and adapters. Key attributes: function (collimation), material (aluminum alloy), size (1.25inch), and performance ( precision collimation). Use scenarios: Before observing: align the optical axis of Newtonian and other reflectors to improve star sharpness and image quality. During astrophotography: recheck and finetune collimation after changing cameras, filters, or accessories to maintain image clarity. In the field: quickly verify collimation onsite during stargazing sessions or at star parties for dependable performance. Additional: allmetal construction provides reliable, longterm performance, with a secure threaded fit and compact design for easy transport and storage. Discover the precise collimation this allmetal 1.25inch eyepiece offers for telescopes, helping you enhance your viewing experience.