This 80mm glued achromatic objective lens is a premium core component for DIY astronomical telescopes. Its large 80mm aperture maximizes light intake, allowing clear viewing of faint celestial bodies. The HD multi-layer coating reduces reflection and glare, boosting light transmittance for sharp, true-color images. The glued achromatic structure corrects color aberration, eliminating fringing around stars and planets. With standard dimensions, it fits most DIY telescope setups, serving astronomy enthusiasts well for nighttime stargazing and celestial observation. Crafted from durable optical glass, it delivers stable performance for long-term outdoor use.