Providing extra stability; our atmospheric dispersion corrector adopts a unique side screw locking design to ensure that the optical components fit tightly and remain stable without wobbling 1.25-inch lens barrel compatible; atmospheric dispersion corrector features a 1.25-inch tube design; compatible with various cameras and eyepieces; It is equipped with a T2 external thread; making it convenient for you to connect more accessories Flexible 4.5° tilt adjustment; the 4.5° tilt adjustment range of the atmospheric dispersion corrector allows observers to finely tune the angle of the prism according to actual needs; bringing unprecedented flexibility to astronomical observations Precise correction; this atmospheric dispersion corrector effectively reduces the impact of atmospheric dispersion on images; enhancing image quality and detail resolution Exceptional precision; through fine adjustments and optimized design; the 1/λ wedge prism accuracy of atmospheric dispersion correction can significantly reduce the impact of atmospheric dispersion on images Precise calibration; the atmospheric dispersion corrector's bubble level ensures quick; accurate horizontal positioning; Bubble centered indicates a level surface High-quality imaging performance; the atmospheric dispersion corrector's FMC features enhanced transmittance; reduced scattering and ghosting; improved contrast; is scratch-resistant and abrasion-proof; as well as offers reduced chromatic aberration Boosting image clarity and contrast; the internal blackened anti-reflective coating of the atmospheric dispersion corrector significantly reduces stray light and ghosting effects; effectively minimizing light reflection and scattering on the surface BK7 prism boosts imaging; BK7 prism of the atmospheric dispersion corrector exhibits excellent dispersion properties; capable of correcting image blur or color distortion; and significantly enhancing the imaging quality of distant celestial objects The SVBONY SV199 Atmospheric Dispersion Corrector is a high-quality device for astronomy. It features a side screw locking design for stability, a 1.25-inch tube with T2 thread for compatibility, and a 4.5° tilt adjustment for flexibility. The double-wedge prism and 1/λ accuracy enhance image quality by reducing distortions. With a bubble level for precise calibration, FMC optics for improved contrast, and a BK7 prism for correcting blur, it's ideal for astronomers and photographers.