Built with a 1.25" nosepiece that fits the most popular size of drawtubes, focusers, and diagonals, the 1.25" 3x Focal Extender from Explore Scientific triples the power of any 1.25" eyepiece, adding another layer of usability to the eyepieces you have. Additionally, since long focal length (low-power) eyepieces often offer a longer eye relief than short focal length (high-magnification) ones, using this focal extender gives you the benefit of comfortable viewing while enjoying high-power observations. The extender has a fully multi-coated 4-element lens configuration to produce bright images with true color representation without distortion across the entire field of view, and the edges of the lenses are blackened to further improve contrast.