This Tele Vue 1.8X Barlow Lens will almost double the magnification you would get with any 1.25" eyepiece and telescope combination, while the parfocal lens always provides a crisp focus when using different powered eyepieces, producing a well-defined image throughout the field of view. It includes a protective dust cap, a lock screw, and the original Tele Vue brand carton for safe travel and storage. Some very slight age-related pitting near lock screw (see photos), otherwise the unit and optics are in very good condition. Made in Taiwan.

Crafted with precision, the fully multi-coated high-quality optics provide crisp, clear zoomed-in images with minimal abnormality, ensuring a superior astronomical viewing experience with all eyepieces and telescopes. It features high index glass for optimum image irregularity correction with virtually no light loss, and its high-quality cemented two-element lens design utilizes high-index low-dispersion glass to minimize chromatic aberration. The lens is designed to be virtually color-free and to match the high-performance standards of Tele Vue eyepieces, providing exceptional contrast and sharpness.

The 1.8x Barlow is sometimes utilized to reach prime focus with binoviewers, especially on telescopes with limited in-travel and is regarded as a high-tier accessory.