DO-GSO Barlow lens 2.5x 1.25 inch

A 2.5x Barlow lens that doubles the effective focal length of your telescope, delivering sharp, high-contrast views for planetary and lunar observation. Its achromatic doublet design with fully multi-coated optics ensures excellent light transmission and minimal chromatic aberration, while the 1.25-inch barrel fits virtually any telescope focuser or diagonal.

Advantages

The fully multi-coated achromatic doublet significantly reduces internal reflections and enhances image clarity. The anodized aluminum housing is both durable and lightweight, and the brass compression ring holds eyepieces securely without scratching. Blackened lens edges further suppress stray light, ensuring maximum contrast. With a clear aperture of 21mm and standard 1.25-inch filter threads, this Barlow is compatible with a wide range of accessories.

Suitable for

• Visual observation of planets, the Moon, and double stars
• Planetary and lunar astrophotography with a DSLR or dedicated astronomy camera
• Users who want to double their eyepiece collection's magnification range
• Any telescope with a 1.25-inch focuser or diagonal

Key specifications

• Magnification factor: 2.5x
• Barrel size: 1.25" (31.7mm)
• Optical design: Achromatic doublet (2 elements in 1 group)
• Lens coatings: Fully multi-coated (FMC)
• Housing material: Anodized aluminum
• Eyepiece clamping: Brass compression ring
• Filter thread: M28.5 x 0.6 (standard 1.25" filter thread)
• Clear aperture: 21mm
• Color: Black
• Included accessories: Dust caps for both ends

Recommendations

For best results, pair this Barlow with high-quality eyepieces and a stable mount. It is an excellent addition to any amateur astronomer's toolkit, effectively expanding your eyepiece collection without the need for additional expensive optics.