Double your power!Barlow Lenses are now in use with thousands of amateur astronomers throughout the world. These lenses increase the power obtained with any given eyepiece while maintaining excellent image quality. Precise corrections for spherical and chromatic aberrations at all photo-visual wavelengths result in sharp high-resolution performance on telescopes of any optical design. Our Barlow Lenses are multi-coated for maximum contrast and light transmission. Meade's #134 2X achromatic Barlow Lens doubles the power of any .965-inch eyepiece it's used with. It's a must-have accessory! Don't go to the star party without a red astronomer's flashlight.