Celestron Omni 1.25" 2X Barlow Lens for Telescope Eyepieces Threaded Barrel | Doubles Eyepiece Magnification, Fully Multi-Coated Optics, Precision Machined Housing, Blackened Edges, High-Contrast Imagery

Product Overview

The Celestron Omni 1.25" 2X Barlow Lens is a telescope accessory designed to double the magnification of standard eyepieces. It features a threaded barrel that attaches directly to the eyepiece, making it a convenient and straightforward addition to any optical system that uses a 1.25‑inch connection. The lens is built by Celestron and is marketed as part of the Omni series.

Key Features

• 2X magnification multiplier for standard 1.25‑inch eyepieces
• Threaded barrel for secure, quick installation
• Fully multi‑coated optics to reduce light loss and improve image quality
• Precision machined housing for accurate alignment
• Blackened edges to minimize glare
• High‑contrast imagery support through optical design

Design and Build

The lens is housed in a precision machined barrel that matches the 1.25‑inch thread size of typical eyepiece adapters. The barrel’s construction provides a stable platform, ensuring that the lens remains centered and that the optical axis is maintained during use. Blackened edges are incorporated around the barrel’s exterior, a design choice that helps reduce reflective artifacts that can interfere with the observer’s view.

Optical Performance

All optical elements within the Barlow lens are fully multi‑coated. Multi‑coating on lens surfaces is a standard technique used to minimize reflections and maximize the amount of light that passes through the optics. The lens doubles the focal length of the eyepiece it is mounted to, effectively doubling the magnification that the eyepiece provides. The optical system is engineered to preserve the clarity and sharpness of the image while enhancing contrast, making celestial objects appear more distinct against the background.

Compatibility and Usage

This Barlow lens is intended for use with telescope eyepieces that fit a 1.25‑inch threaded adapter. Once the lens is threaded onto the eyepiece, the combined system can be attached to a telescope’s focuser or an eyepiece holder that accepts the same 1.25‑inch thread. Because the lens simply extends the focal length of the eyepiece, it can be used with a variety of standard eyepieces without altering the telescope’s existing optical path.

Care and Maintenance

To maintain optimal performance, clean the lens and barrel with a dry, lint‑free cloth after each use. Avoid touching the multi‑coated surfaces with fingers or cleaning materials that could leave residue. Store the Barlow lens in a dry environment when not in use, preferably in its original packaging or a protective case to prevent dust accumulation and physical damage.