Explore Scientific 1.25" 2x Focal Extender

The most versatile focal extender in the lineup — the Explore Scientific 1.25" 2x doubles the magnification of every eyepiece you own while preserving eye relief and field performance. Built around a telecentric 4-element optical design with EMD-enhanced multi-coatings on all air-to-glass surfaces, it delivers sharper edge performance and flatter fields than a traditional 2- or 3-element Barlow. The telecentric design also keeps magnification consistent regardless of spacing in the optical path — critical for imaging setups with filter wheels or flip mirrors.

A non-marring compression ring clamp holds eyepieces securely without scratching, and the double-tapered insert barrel ensures smooth, safe insertion into any 1.25" focuser. Threaded for standard 1.25" astronomy filters.

Key Features

• 4-element telecentric optical design — sharper fields and more consistent magnification than standard Barlows
• EMD-enhanced fully multi-coated optics with edge-blackened elements for maximum contrast
• Doubles your effective eyepiece collection without buying additional eyepieces
• Non-marring compression ring clamp and double-tapered insert barrel
• Threaded for 1.25" astronomy filters

Ideal For

• First-time extender buyers — the 2x factor is the most practical starting point, effectively turning three eyepieces into six focal lengths
• Planetary and lunar observing — push a comfortable 20mm eyepiece to 10mm-equivalent magnification with full eye relief
• Astrophotographers — telecentric design maintains consistent magnification through the imaging chain