Precision optics. Durable and lightweight, aluminum optical tube with a 360mm focal length. The objective lengs' 50mm 2-element coated all-glass achromatic lens eliminates color distortion. The eyepiece is connected to a diagonal mirror for comfort able viewing. 2 high-quality, interchangeable glass eyepieces also included for optimal viewing power; H20mm (20x) and H9mm (40x). The 2x image erecting eyepiece orients images correctly and doubles eyepiece magnification (40x &
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