Explore Scientific Focal Extender

While both serve the same purpose of increasing magnification, this focal extender uses a more complex four-element optical design. This design is specifically engineered to maintain image sharpness and contrast across the entire field of view, minimizing the aberrations often found in simpler, lower-cost Barlow lenses.

Yes, this focal extender is designed specifically for standard 2-inch eyepiece slots. As long as your telescope focuser accepts 2-inch accessories, this unit will fit seamlessly.

Using an extender allows you to keep the comfortable eye relief of your lower-power eyepieces while effectively doubling your magnification options. It is a practical way to expand your kit without needing to invest in a completely new set of high-power eyepieces.

Because it uses a four-element optical system, it is designed to preserve the clarity and detail of your view. While any additional glass in the light path can theoretically introduce minor light loss, this extender is built to minimize distortion and maintain high image quality for celestial observation.

No, this focal extender is not water-resistant. You should avoid using it in damp conditions or heavy dew, and always store it in a dry, protected environment when not in use to prevent internal fogging or damage to the optics.