This image amplifier uses an advanced four-element optical design that delivers a flatter field-of-view with sharper field edges than even the best three-element apochromatic Barlows. You get all of the wide field of view of your 2" eyepieces without degrading the sharpness at the edge of the field as a conventional Barlow can. A 1.25” adapter lets you use this “TeleXtender” with your 1.25” eyepieces, as well. All air-to-glass surfaces of its four premium optical glass lenses are fully coated with multiple layers of individually tuned ion-deposited anti-reflection materials for maximum light transmission and contrast. The lens edges and all internal metal surfaces are blackened to maximize the image contrast. Eyepieces are held in both the 1.25” adapter and the “TeleXtender” by non-marring clamp rings that won’t scratch your eyepieces as conventional metal thumbscrews can. A safety groove machined into the chrome barrel of the “TeleXtender” keeps it from falling should the focuser thumbscrew loosen accidentally.

This image amplifier doubles the power of any 1.25” or 2” eyepiece used with it, while still maintaining the comfortable eye relief of longer focal length eyepieces.