ASToptics 2x Barlow Lens T2 1.25″
Professional Achromatic Barlow Lens for Enhanced Telescope Performance
The ASToptics 2x Barlow Lens represents a premium optical solution for all astronomers who need to double their telescope's focal length. This precisely manufactured lens utilizes achromatic construction that minimizes chromatic aberration and ensures sharp, high-contrast images during both visual observation and astrophotography of celestial objects. The standard 1.25″ mounting diameter guarantees compatibility with most telescopes available on the market.
Versatile Design for Visual and Photographic Applications
One of the greatest advantages of this Barlow lens is its universal application. While the input side features a standard 1.25″ diameter for connection to telescope eyepieces, the output side is equipped with a practical T2 thread. This thread allows direct camera connection using an appropriate T-ring, making this lens an ideal tool not only for visual observation but primarily for astrophotography. This enables easy switching between visual observation and photography without the need for complex setup changes.
Superior Achromatic Optical Construction
The achromatic construction of this Barlow lens is a key factor in achieving excellent optical quality. Achromatic glass is specially designed to correct chromatic aberration - color fringing that appears as colored edges around observed objects. Thanks to this advanced construction, you get sharp and color-accurate images that are essential for both quality observation and astrophotography.
Double Magnification for Enhanced Detail
When using this Barlow lens, your telescope's focal length doubles, which practically means double magnification during observation. For example, if you're using a telescope with 1000mm focal length and a 10mm eyepiece (100x magnification), with this lens you'll achieve 200x magnification. This flexibility is invaluable especially when observing planets, the Moon, and double stars, where higher magnification reveals more details.
T2 Thread for Direct Camera Connection
For astrophotographers, the T2 thread on the output side represents a significant advantage. Using an appropriate T-ring, you can directly connect your camera and use the telescope as a telephoto lens with doubled focal length. This solution is ideal for photographing planets, the Moon, and bright deep-sky objects where you need a larger image scale on your photographs.
Universal Compatibility and Professional Build Quality
The standard 1.25″ diameter ensures wide compatibility with telescopes from all major manufacturers. The lens simply inserts into the telescope's focuser in the same way as a regular eyepiece. Quality mechanical construction guarantees firm and stable mounting without unwanted movement or play. Anti-reflection coating on optical surfaces minimizes light loss and suppresses unwanted reflections, which is particularly important during photography.
Technical Specifications
- Magnification factor: 2x
- Input diameter: 1.25″ (31.7mm)
- Output thread: T2 (M42x0.75)
- Optical design: Achromatic
- Anti-reflection coating: Multi-coated
- Construction: All-metal housing
- Weight: Approximately 150g
Camera Connection and T-Ring Compatibility
When selecting a T-ring for camera connection, it's important to ensure compatibility with your specific camera type. T-rings are available for all major camera systems including Canon, Nikon, Sony, Olympus, and others. After connecting your camera, you effectively get a telephoto lens with double the focal length of your original telescope.
Maintenance and Care Instructions
For long-term preservation of optical quality, we recommend regular cleaning of optical surfaces using specialized optical cleaning products. Store the lens in a dry environment and protect it from dust and moisture. During handling, avoid touching optical surfaces with fingers and always use protective covers if included in the package.
Applications and Benefits
Visual Astronomy
- Enhanced planetary observation with increased magnification
- Detailed lunar crater exploration
- Double star separation and analysis
- Improved resolution of globular clusters
Astrophotography
- Direct camera mounting via T2 thread
- Increased focal length for better image scale
- Ideal for planetary and lunar photography
- Perfect for bright deep-sky object imaging
Investment in Quality Astronomy Equipment
This Barlow lens represents an excellent investment for every astronomer who wants to expand their telescope's capabilities. The combination of quality achromatic optics, universal application, and practical T2 thread makes it an indispensable accessory for modern astronomy and astrophotography. Whether you're a beginner looking to explore higher magnifications or an experienced astrophotographer seeking better image scale, this ASToptics Barlow lens delivers professional results at an affordable price point.
