ECSiNG Telescope Focusing Mask 123x86mm for 84-115mm Outer Diameter Reflecting Dobsonian

Suitable for various types of telescopes with an outer diameter of the objective lens between 84mm and 115mm, including reflective, refracting, Mak-Cass, SCT and Dobsonian, etc., with strong compatibility. The fishbone plate is 123x86mm in size, with a reasonable structure, suitable for the focusing system of mainstream astronomical telescopes, and can be stably installed without additional adjustment. The "fishbone plate" design can effectively improve the focusing accuracy of the telescope, making the celestial body imaging clearer and sharper, suitable for astronomical observation and astrophotography. Made of lightweight plastic material, it is strong and not easy to deform, UV-resistant and low-temperature-resistant, suitable for long-term outdoor night use. Easy to operate, can be directly buckled in front of the telescope objective lens, quickly installed/disassembled, convenient for field observation and portable carrying.