Barlow-lens DO-GSO ED 2x 2 inch

Double the magnification of any 2-inch eyepiece with this ED Barlow lens, engineered for edge-to-edge sharpness and true colour rendition. Its extra-low dispersion glass element effectively suppresses chromatic aberration, delivering high-contrast views ideal for lunar, planetary, and double-star observation.

Advantages

The fully multi-coated ED doublet provides high light transmission and contrast, while the anodized aluminium body with brass compression ring ensures a secure, non-marring grip on eyepieces. A built-in M48x0.75 filter thread accepts standard 2-inch filters, and the included dust caps protect the optics during storage.

Suitable for

• Visual observers using 2-inch eyepieces who want to double their magnification range
• Astrophotographers needing higher effective focal length for lunar and planetary imaging
• Telescopes with 2-inch focusers or diagonals
• Users who value colour-free, high-contrast views at high power

Key specifications

• Magnification factor: 2x
• Barrel diameter (input and output): 2 inch (50.8 mm)
• Optical design: ED achromatic doublet (2 elements)
• Lens coating: fully multi-coated (FMC)
• Filter thread: M48x0.75 (2 inch)
• Eyepiece clamping: brass compression ring
• Body material: anodized aluminium
• Colour: black
• Clear aperture: 38 mm
• Overall length: 120 mm
• Maximum diameter: 60 mm
• Included accessories: dust caps
• Manufacturer: GSO (Guan Sheng Optical)

Recommendations

For best results, pair this Barlow with high-quality 2-inch eyepieces of moderate focal length. It is especially effective for high-resolution lunar and planetary work.