The lens unit varies the power obtained with any given eyepiece while maintaining excellent image quality. Their precise corrections for spherical and chromatic aberrations at all photo-visual wavelengths result in sharp, high-resolution performance on telescopes of any optical design.
Barlow lenses offer an easy, economical way to increase the magnification range of your eyepieces, and Celestron carries a number of these highly useful lenses. A Barlow lens doubles the magnifying power of your eyepiece by doubling its effective focal length.
The Meade #128 3x Short-Focus Barlow 1.25" is a high-power compact Barlow - ideals for systems with limited focus travel. Triple the power of your eyepiece with this high-quality short telenegative Barlow.