Description
Product Overview
The Alstar 2in Barlow Lens is engineered for serious astronomers who demand clarity and performance. Constructed with extra‑low dispersion (ED) glass, the lens dramatically reduces chromatic aberration, delivering crisp, high‑contrast images across the visible spectrum. Both optical surfaces are treated with a durable green multi‑coat that enhances light transmission and protects against scratches. Measuring 6 x 3 x 3.4 inches and weighing just 4.8 ounces, the lens offers a compact, portable solution without compromising build quality. Its threaded design allows seamless attachment to 2‑inch eyepieces, while the lower element can be unscrewed for use with 1.25‑inch accessories, providing versatile compatibility for a wide range of telescopic setups.
Usage
Designed for both visual observation and astrophotography, this Barlow lens excels in deep‑sky sessions, planetary detail work, and lunar imaging. Whether you are setting up on a backyard pier, a portable field tripod, or a permanent observatory, the lens’s high‑grip exterior ensures secure handling, even when wearing gloves in cold conditions. Its 2× magnification factor is ideal for compact celestial objects such as nebulae and galaxies, allowing you to capture finer detail without the need for additional focal length extensions. 
Why Choose Us
Alstar’s reputation for optical precision is reflected in the meticulous manufacturing of this Barlow lens. Each unit undergoes rigorous quality control to guarantee consistent performance and durability. The combination of ED glass and multi‑coat technology sets it apart from standard glass lenses, offering superior color correction and brightness. Additionally, the lens is backed by a no‑discontinue policy, ensuring long‑term availability for your equipment upgrades.
Key Features
- ED glass element minimizes chromatic aberration for crystal‑clear images
- Green multi‑coat enhances light transmission and protects optics
- 2× magnification doubles focal length for deeper sky detail
- Dual compatibility: fits 2‑inch and 1.25‑inch eyepieces via removable lower element
- High‑grip exterior provides secure handling, even with gloves
FAQ
Can this Barlow lens be used with 1.25‑inch eyepieces?
Yes. The lower element unscrews and threads onto a 1.25‑inch eyepiece, allowing the same 2× magnification benefit.
Does the multi‑coat affect image color fidelity?
The green multi‑coat is designed to increase transmission while preserving true color balance, so images remain natural and vibrant.
Is the lens suitable for astrophotography?
Absolutely. The ED glass and 2× magnification help capture finer detail on compact objects, making it a valuable tool for both visual and imaging sessions.
What is the warranty on this product?
Alstar provides a one‑year limited warranty covering manufacturing defects, ensuring reliable performance.
How do I clean the lens without damaging the coating?
Use a soft, lint‑free microfiber cloth and a few drops of lens cleaning solution. Gently wipe in a circular motion, avoiding abrasive materials.
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