Measuring a mere 2.5" long, the #126 Short-Focus Barlow Lens (1.25") can be inserted into a star diagonal for 2x power, or the diagonal can be inserted into the #126 for 3x power. It's a perfect match for any telescope that accepts 1.25" eyepieces, even those with limited focus range like the ETX and DS series. The #126 maintains the crisp image quality achieved by the #122 lens.

The lens is multi-coated for maximum image contrast and light transmission, and provides precise corrections for spherical and chromatic aberrations at all photo-visual wavelengths. 27mm diameter (26mm clear aperture).