1 x 60mm Green Multi-Layer Double Separation Lens for DIY Astronomical Telescopes Refractors (D60F700)

60mm Dual Separation Multi-layer Lens Specially Designed for DIY Astronomical Telescopes Refractors Versatile focal lengths available: 300, 360, 400, 500, 600, 700, 800 and 900mm to meet different observation needs. It has a green film coating on all sides for enhanced image clarity and reduced light reflections, ensuring optimal viewing experiences. Precision engineering with diameter tolerance of +0/-0.12mm and focal length tolerance of ±0.1% for accurate performance. Includes two sets of double separation lenses for refraction, perfect for both astronomical telescope lenses and star seekers.